niagara kit

330 tools. Generated from the plugin source; do not edit by hand.

Guide

The niagara kit edits Niagara systems, emitters, stack modules, renderers, user parameters, parameter collections and effect types, drives Niagara components in the level and in PIE, and runs audits, finders and batch edits over folders. It is loaded only when the Niagara plugin is enabled and supports UE 4.27 and 5.x; tools that need a newer engine are hidden (minEngine in annotations.uea).

Start here

niagara.create {"folder":"/Game/FX","name":"NS_Sparks"}
niagara.add_emitter {"system":"/Game/FX/NS_Sparks","emitterAsset":"Fountain","name":"Sparks"}
niagara.add_user_parameters {"system":"/Game/FX/NS_Sparks","parameters":["SpawnRate:float=50","Tint:color=(R=1,G=0.5,B=0,A=1)"]}
niagara.set_sprite_renderer {"system":"/Game/FX/NS_Sparks","emitter":"Sparks","values":["Material=/Game/FX/M_Spark","Alignment=VelocityAligned","SortMode=ViewDepth"]}
niagara.set_renderer_binding {"system":"/Game/FX/NS_Sparks","emitter":"Sparks","renderer":"0","binding":"ColorBinding","attribute":"Particles.Color"}
niagara.compile {"system":"/Game/FX/NS_Sparks"}
niagara.wait_compile {"system":"/Game/FX/NS_Sparks"}
niagara.validate_renderers {"system":"/Game/FX/NS_Sparks"}
niagara.spawn_actor {"system":"/Game/FX/NS_Sparks","actor":"SparksFX","location":{"x":0,"y":0,"z":100}}
niagara.capture_component_state {"actor":"SparksFX"}

emitterAsset accepts an asset path or a template name from /Niagara/DefaultAssets/Templates/Emitters (Fountain, DirectionalBurst, LocationBasedRibbon, HangingParticulates, SimpleSpriteBurst, UpwardMeshBurst... on both engines).

Addressing

Argument	Form
system	asset path (/Game/FX/NS_Sparks) or a unique asset name
emitter	emitter handle name or index inside the system
renderer	index from list_renderers, or a kind (sprite, mesh, ribbon, light, component, decal) when the emitter has exactly one renderer of that kind; several are an error that lists the indices, never a pick. The typed *_<kind>_renderer tools accept an empty renderer with the same rule.
user parameter name	SpawnRate or User.SpawnRate
collection parameter name	friendly name (Wind) or the full NPC.<Namespace>.Wind
actor / name (components)	actor label; name is the Niagara component name and may be omitted when the actor owns one

Every mutator records its transaction and marks the asset dirty; renderer and emitter mutators request compilation. Replies carry the resolved objects (paths, indices, types) so a second read is rarely needed.

Systems

Start with niagara.create_from_template (SimpleExplosion, RadialBurst, DirectionalBurst) or a recipe: recipe_fountain, recipe_burst (variant omni|directional|sprite|mesh), recipe_beam (dynamic|static), recipe_ribbon, recipe_smoke (2 s warmup, fixed bounds), recipe_sparks (Sparks + Embers handles). The gpu, localSpace and boundsExtent options apply to every recipe; ribbons and beams are CPU only. niagara.list finds systems (GPU flag, effect type).

• create, duplicate, rename (same name is a no-op), delete, save, get, list_emitters, list_templates, export_summary, get_stats, validate.
• compile requests compilation; get_compile_status polls; wait_compile waits until the VM scripts are compiled and fails if compilation is still pending.
• Read before editing: get_properties, get_system_simulation, get_system_metadata, get_scalability, get_effect_type.
• set_properties writes any reflected UNiagaraSystem property from Unreal text; typed controls (set_warmup, set_fixed_bounds, set_determinism...) wrap it. Grouped setters change only the fields you pass (strings; empty = unchanged; "default" clears a rendering override): set_system_simulation (warmup; determinism, seed and fixed tick need 5.0+), set_system_rendering (5.0+), set_system_performance, set_system_metadata.
• Scalability: add/set/remove_scalability_override on the system (quality levels "Low,High" or "all"; distance and instance fields turn their override flags on). On the effect type: set_effect_type_settings (update frequency, cull reaction), add/set/remove_effect_type_scalability, add/remove_effect_type_emitter_scalability (spawn-count scale).
• Effect types: create_effect_type, then set_effect_type; set_system_cull_reaction and set_system_significance_handler edit the effect type assigned to the system.
• Compile loop: niagara.compile → niagara.wait_compile → niagara.get_compile_errors / niagara.validate (typed issues with the fixing tool) → list_system_scripts / get_script_source.
• Compare and move: diff_system A B. export_recipe (optional absolute .json file) then import_recipe (inline recipe or file) rebuilds a system from emitter source assets, property overrides and user parameters; emitters without a parent asset are listed under skipped.

Emitters

Every emitter argument takes a handle name, an index or the handle id GUID; prefer the id from handles[] because indices change after niagara.reorder_emitter. Handles are addressed by name or index: add_emitter, duplicate_emitter, rename_emitter, remove_emitter, set_emitter_enabled, set_emitter_isolated, get_emitter, set_emitter_properties and its typed controls, event handlers and simulation stages. Typed groups: get/set_emitter_simulation (cpu/gpu, local space, determinism, seed, interpolated spawn), get/set_emitter_allocation, get/set_emitter_bounds (dynamic, fixed, or programmable on 5.1+, plus a min/max box), get/set_emitter_lifecycle (Emitter State Loop Duration/Delay/Count; linked or dynamic inputs are reported as not found). Scalability: get_emitter_scalability, set_emitter_platforms, add/remove_emitter_scalability_override.

Events: list_event_generators; add_event_handler creates an empty event stack (source emitter, event name, execution mode, spawn number), then add modules with the module tools on event:<usageId>.

Inheritance: get_emitter_inheritance, set_emitter_parent (reparent + merge), sync_emitter_with_parent, remove_emitter_parent; on 5.1+ set_emitter_parent_version, and on standalone emitter assets enable/add/expose/delete/list_emitter_versions (versions as GUID or "1.1"; 1.0 and the exposed version cannot be deleted). Inspect: list_emitter_attributes (after compile), diff_emitter, get_emitter_asset, set_emitter_asset_metadata.

Gotchas: every emitter mutation requests a compile — call wait_compile before reading compiled data. 4.27 has no emitter versions, system determinism or rendering overrides. get_dependencies reflects saved packages only.

Renderers

Kinds and schema. list_renderer_fields {"kind":"mesh"} returns the settable fields of a kind with their types (bool, int, float, enum:<Enum>, object:<Class>, class:<Base>, struct:<Struct>) and the kind's attribute bindings. The schema holds the fields present on UE 4.27 and 5.x; the decal kind exists on UE 5.2+.

Kind	get / set	Typical fields
sprite	get_sprite_renderer / set_sprite_renderer	Material, Alignment, FacingMode, SortMode, PivotInUVSpace, SubImageSize, bSubImageBlend, cutout, camera-distance culling, RendererVisibility
mesh	get_mesh_renderer / set_mesh_renderer	FacingMode, SortMode, locked axis, frustum/camera culling, flipbook, bOverrideMaterials
ribbon	get_ribbon_renderer / set_ribbon_renderer	Material, FacingMode, UV0Settings/UV1Settings, Shape, MultiPlaneCount, TubeSubdivisions, tessellation
light	get_light_renderer / set_light_renderer	RadiusScale, DefaultExponent, ColorAdd, falloff and translucency flags
component	get_component_renderer / set_component_renderer	ComponentType (class), ComponentCountLimit, bAssignComponentsOnParticleID
decal (5.2+)	get_decal_renderer / set_decal_renderer	Material, SourceMode, DecalScreenSizeFade

Every kind also accepts bIsEnabled, SortOrderHint and MotionVectorSetting. A setter takes values: ["Field=Value", ...]; every entry is checked against the schema before anything is written, object fields take asset paths (None clears), class fields take class names. addIfMissing: true creates the renderer when the emitter has none of that kind (upsert). The reply lists every field with its new value and changed[].

Structure. add_renderer (one kind or a comma list), remove_renderer, duplicate_renderer (same or targetEmitter), reorder_renderer (newIndex, UE 5.2+), set_renderer_enabled, set_renderer_material (sprite, ribbon, decal), set_renderer_sort_order, get_renderer, list_renderers.

Meshes and material overrides (mesh renderers): list_renderer_meshes, add_renderer_mesh (mesh, optional scale, pivotOffset), set_renderer_mesh (index; empty fields keep their value), remove_renderer_mesh, set_mesh_pivot (every entry). Override slots: list_material_overrides, add_material_override (turns bOverrideMaterials on), set_material_override, remove_material_override (turns it off when the list empties).

Visibility. get_renderer_visibility returns the RendererVisibility tag value, the attribute bound to RendererVisibilityTagBinding and the enabled flag; set_renderer_visibility takes an integer visibility. A renderer draws only particles whose visibility tag equals its value.

Bindings. list_renderer_bindings shows each binding (ColorBinding, PositionBinding, SpriteSizeBinding...) with the bound attribute, type, whether it reads particle data and whether the emitter provided it at the last compile. set_renderer_binding binds an attribute (Particles.Color, Particles.MyScale, User.Tint) through the engine binding API; reset_renderer_binding restores the class default; get_renderer_binding reads one. validate_renderer_bindings reports bindings the emitter does not provide, and validate_renderers checks every enabled renderer of a system (sim-target support, missing material, empty mesh list, override flag without slots, component type, unresolved bindings). Run validation after compile + wait_compile: binding existence is refreshed by compilation.

The older single-field wrappers (set_sprite_alignment, set_sprite_facing, set_mesh_sort, set_ribbon_uv, set_light_radius, set_component_template...) remain; they now require a renderer of their kind. set_renderer_property writes any reflected property path for advanced cases.

Parameters

User parameters. add_user_parameter / add_user_parameters ("Name:type=value"), get_user_parameter (type, kind, value, floats, object path), list_user_parameters, rename_user_parameter, remove_user_parameter, list_parameter_types, audit_user_parameters (every parameter with its default, plus issues: outside the User. namespace, unset object or data interface, duplicate friendly names), copy_user_parameters (definitions and values to another system; overwrite replaces same-typed parameters).

Type	Set	Get
float, int, bool, vec3, vec4, color	set_user_parameter or set_user_parameter_<type>	get_user_parameter
vec2, quat	set_user_parameter_vec2 / _quat	get_user_parameter_vec2 / _quat
position (5.0+)	set_user_parameter_position ((X=..,Y=..,Z=..), double precision kept)	get_user_parameter_position
matrix	set_user_parameter_matrix (values: 16 floats, row-major)	get_user_parameter_matrix
object	set_user_parameter_object (any asset)	get_user_parameter_object
texture, render target, material	set_user_parameter_texture / _render_target / _material	matching get_
static mesh (5.0+)	set_user_parameter_static_mesh	get_user_parameter_static_mesh
data interface	add_user_data_interface (dataInterfaceClass), set_user_parameter_data_interface (values: ["Field=Value"], editable fields only)	get_user_parameter_data_interface (fields as Field:Type=Value)

Typed setters check the parameter's type (a mismatch is E_INVALID_ARG naming the real type) and accept addIfMissing: true to create the parameter with the tool's type. Object setters take an asset path or None. list_data_interface_classes lists usable data interface classes (NiagaraDataInterfaceTexture, NiagaraDataInterfaceCurve, ...); add_user_parameter also accepts di:<Class>, matrix, object, texture, texture_render_target, material, and on 5.0+ position / static_mesh (numeric value defaults apply to numeric types only).

Collections. create_parameter_collection, get_parameter_collection, add_collection_parameter(s), get_collection_parameter (typed default), set_collection_parameter and typed setters, rename_collection_parameter (collection, default instance and every instance asset; same name is a no-op), remove_collection_parameter, duplicate_collection (UE 5.3+, the engine gives the copy a unique namespace), audit_collection (parameters outside the namespace, unset objects, instances that lack or keep stale parameters).

Instances and overrides. create_parameter_collection_instance, get_collection_instance (parent, namespace, every value with its override flag), list_collection_instances (instance assets under /Game whose parent is the collection), set_collection_instance_parent, set_collection_instance_parameter, list_collection_overrides, get_collection_override, set_collection_override (marks the parameter overridden, optional value typed by the collection parameter), remove_collection_override (clears the flag and restores the collection default).

Modules and stack editing

list_script_assets / get_script_asset, add_module, add_set_parameters_module.

• Addressing. A stack is usage: systemSpawn/systemUpdate (leave emitter empty), or emitterSpawn, emitterUpdate, particleSpawn, particleUpdate, event:<index|guid>, stage:<index|guid|name> (with emitter). A module is its GUID (from list_modules), its index, or its unique name. An input is its name or display name; Parent/Child reaches the inputs of a dynamic input.
• Recipe: 1) niagara.list_stacks {system}; 2) niagara.add_module {system, emitter, usage:'particleUpdate', moduleScript:'/Niagara/Modules/...', index} (5.1+), keep module.guid; 3) niagara.list_module_inputs {…, module:<guid>} (5.2+); 4) niagara.set_module_input {…, input:'SpawnRate', value:'25'}, or set_linked_input {parameter:'User.Rate'} (5.6+), or set_dynamic_input {dynamicInputScript:'/Niagara/DynamicInputs/UniformRange/UniformRangedFloat'} then set_module_input {input:'SpawnRate/Minimum'}; 5) reset_module_input to undo an override; 6) list_stack_issues / apply_stack_issue {issue:''} applies the first fix of every fixable issue; 7) wait_compile.
• Values: numbers, true/false, enum entry names, or UE struct text such as (X=0,Y=0,Z=100) or (R=1,G=0,B=0,A=1).
• Simulation stages: add_simulation_stage {name}, then modules via usage:'stage:<name>', then set_simulation_stage / move_simulation_stage / remove_simulation_stage. set_event_handler edits source emitter/event, execution mode and spawn counts.
• Gotchas: mutators request a compile (poll with wait_compile); module moves are not supported (delete and re-add); UE 4.27 has the graph tools only (list, enable, set-parameters modules, event handlers, simulation stages) — input editing and issues need 5.2+; inherited modules cannot be deleted, disable them with set_module_enabled.

Level components

Editor world (RequiresWorld): spawn_actor, delete_actor, add_component, list_components, list_level_components (every Niagara component of the level, optional system filter, with counts), get_component, capture_component_state, activate, deactivate, reset_component, set_component_asset, set_component_age, set_component_auto_activate, set_component_visibility (visible, propagateToChildren), set_component_rendering_enabled (hide while simulating), set_component_tick_enabled (enabled, optional tickBehavior: UsePrereqs, UseComponentTickGroup, ForceTickFirst, ForceTickLast).

Instance parameters: list_component_parameters, get_component_parameter, set_component_parameter and the typed set_component_* setters (property is the variable name, e.g. User.SpawnRate), set_component_actor (assign a level actor to an object user parameter), set_component_object (object, material, render target; texture and static mesh on 5.0+; the setter follows the parameter's type).

capture_component_state returns asset, active/paused/visible/rendering/tick/auto-activate flags, tick behavior, desired and simulation age, location, per-emitter particle counts and every override parameter value.

PIE (live)

RequiresPIE tools act on the play world: spawn_test_actor (actor whose root is a Niagara component named NiagaraSmokeComponent), spawn_at_location, spawn_attached, set_live_parameter, set_paused, get_system_bounds, capture_live_component_state, list_particle_counts (every component, optional system filter, per-emitter live and spawned counts and execution state), get_particle_counts, set_live_visibility, activate_live_component, deactivate_live_component, reset_live_component, seek_live_component (value = age in seconds), advance_live_component (tickCount ticks of tickDelta seconds, synchronously), kill_all (deactivate immediately, optional system filter). Engine templates such as /Niagara/DefaultAssets/Templates/Systems/RadialBurst work in any project. GPU emitters report counts one frame late.

Batch, audits and finders

All batch tools scan a folder recursively (empty means /Game), continue past failures and return items[] (asset, status: changed, unchanged, wouldChange, matched, valid, invalid, failed, detail) plus processed, changed, failed. Mutating batches take dryRun (default true): run once with it, read items[], then run with dryRun: false.

Tool	Does
batch_compile	requests compilation of every system
batch_validate	system validity, emitters without renderers and every renderer check
batch_set_scalability	assigns one effect type (None clears)
batch_replace_material	swaps from → to in sprite/ribbon/decal materials and mesh override slots
batch_set_renderer_field	writes one schema field on every renderer of a kind
batch_set_user_parameter	sets a numeric user parameter default where it exists (type-checked)
batch_rename_user_parameter	renames a user parameter and requests compilation
batch_audit_user_parameters	user parameter schema audit per system
batch_set_fixed_bounds	sets the same fixed bounds everywhere
find_by_parameter / find_by_script / find_by_renderer / find_by_data_interface / find_by_mesh / find_by_effect_type / find_by_emitter_parent / find_by_material / find_gpu_systems	finders; find_by_script inspects the loaded stack graphs, so unsaved systems are found too

recipe (fountain, burst, ribbon_trail), list_recipes and audit complete the theme.

Recipes

Tinted sprite burst driven from Blueprint.

1. create, add_emitter {"emitterAsset":"SimpleSpriteBurst","name":"Burst"}.
2. add_user_parameters {"parameters":["Tint:color=(R=1,G=0.2,B=0,A=1)","Size:float=20"]}.
3. Bind or reference them in modules (see the stack editing section), set_renderer_binding for renderer inputs that should read User. data.
4. compile, wait_compile, validate_renderers.
5. In the level: spawn_actor, set_component_parameter {"property":"User.Tint","type":"color",...}.

Mesh debris. add_renderer {"type":"mesh"}, add_renderer_mesh {"mesh":"/Game/Rocks/SM_Rock"}, set_renderer_mesh {"index":0,"scale":"(X=0.5,Y=0.5,Z=0.5)"}, add_material_override {"material":"/Game/Rocks/M_Rock_Dirty"}, set_mesh_renderer {"values":["FacingMode=Velocity","bEnableFrustumCulling=true"]}.

Texture-driven effect. add_user_data_interface {"name":"Mask","dataInterfaceClass":"NiagaraDataInterfaceTexture"}, set_user_parameter_data_interface {"name":"Mask","values":["Texture=/Game/FX/T_Mask"]}; or a plain texture parameter: set_user_parameter_texture {"name":"Mask","asset":"/Game/FX/T_Mask","addIfMissing":true}.

Project-wide material swap. batch_replace_material {"folder":"/Game/FX","from":"/Game/FX/M_Old","to":"/Game/FX/M_New"} (dry run), check items[], repeat with "dryRun": false, then batch_compile.

PIE check. Start PIE, spawn_test_actor {"system":"/Game/FX/NS_Sparks","actor":"FXProbe"}, get_particle_counts {"actor":"FXProbe"}, seek_live_component {"actor":"FXProbe","value":1.5}, capture_live_component_state {"actor":"FXProbe"}, kill_all.

Gotchas

• Compile after emitter, renderer or parameter changes; mutators already request it and replies say so. Binding existence (existsOnSource) and system validity reflect the last compile.
• Engine templates are read-only; add them to your own system or copy them with create_emitter_asset + parent.
• A field or parameter that does not exist on the running engine fails with E_INVALID_ARG or E_NOT_SUPPORTED naming the minimum engine; nothing is silently skipped or guessed.
• Renderer kind lookups never pick "the first" of several: pass the index when an emitter has two renderers of a kind.
• Position and static mesh parameter types, component texture/static-mesh setters: UE 5.0+. Decal renderers and reorder_renderer: UE 5.2+. duplicate_collection: UE 5.3+.
• Level tools use the editor world; *_live_*, particle counts and kill_all need PIE.

Tools

Legend. risk 0 = read-only, 1 = harmless editor op, 2 = modifies asset, 3 = deletes/replaces asset, 4 = project/config/build op, 5 = potentially destructive (calls above MaxAutoRisk need "_confirm": true). mutates = runs in a transaction (edit.undo reverts). requires PIE / requires world = refused without a PIE session / an open level. requires plugin = unavailable while the plugin is disabled. dryRun = honours the dryRun argument. smoke = covered by edit.self_test.

niagara.activate (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
system	string	required. Niagara system asset path.
name	string	Component name.

Returns: component, system, active, message.

niagara.activate_live_component (risk 2, mutates, requires plugin Niagara, requires PIE, smoke)

Activates (restarts) a Niagara component in the PIE world.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.

Returns: actor, component, system, world, active, paused, visible, renderingEnabled, tickEnabled, autoActivate, complete, tickBehavior, desiredAge, age, location, particles, emitters, parameters, message.

niagara.add_collection_parameter (risk 2, mutates, requires plugin Niagara, smoke)

Adds a parameter to a collection; name is the friendly name (the NPC namespace is added) and value an optional default.

Argument	Type	Description
collection	string	required. Parameter collection asset path.
name	string	required. Parameter name.
type	string	UE type name. Default TEXT("float").
value	string	Text-import value.

Returns: parameters, count, message.

niagara.add_collection_parameters (risk 2, mutates, requires plugin Niagara, smoke)

Adds several collection parameters in one call; each entry is "Name:type=value".

Argument	Type	Description
collection	string	required. Parameter collection asset path.
parameters	array of string	required. Entries "Name:type=value".

Returns: parameters, count, message.

niagara.add_component (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
system	string	required. Niagara system asset path.
name	string	Component name.

Returns: component, system, active, message.

niagara.add_effect_type_emitter_scalability (risk 2, mutates, requires plugin Niagara, smoke)

Appends an emitter spawn-count scaling entry (quality levels + scale) to an effect type.

Argument	Type	Description
system	string	Niagara system asset path (used to find the effect type when effectType is empty).
effectType	string	Effect type asset path.
index	integer	Entry index for remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic.
scaleSpawnCount	boolean	Scale spawn counts on these quality levels. Default true.
spawnCountScale	number	Spawn count multiplier (0..1 typical). Default 1.0f.

Returns: system, effectType, overrideScalability, entries, emitterEntries, fields, count, message.

niagara.add_effect_type_scalability (risk 2, mutates, requires plugin Niagara, smoke)

Appends a per-quality system scalability setting to an effect type (distance and instance culling).

Argument	Type	Description
system	string	Niagara system asset path (system overrides) or empty when effectType is given.
effectType	string	Effect type asset path (effect-type tools; empty uses the system's effect type).
index	integer	Entry index for set/remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic. Empty leaves it.
cullByDistance	string	Cull by distance: true/false (empty leaves it). Setting distance fields turns their override on.
maxDistance	string	Maximum distance in cm (empty leaves it).
cullMaxInstanceCount	string	Cull when the effect type exceeds maxInstances: true/false (empty leaves it).
maxInstances	string	Maximum instances of this effect type (empty leaves it).
cullPerSystemMaxInstanceCount	string	Cull when this system exceeds maxSystemInstances: true/false (empty leaves it).
maxSystemInstances	string	Maximum instances of this system (empty leaves it).

Returns: system, effectType, overrideScalability, entries, emitterEntries, fields, count, message.

niagara.add_emitter (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitterAsset	string	required. Emitter asset path or common alias such as Fountain.
name	string	Handle name. Default TEXT("Emitter").

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.add_emitter_scalability_override (risk 2, mutates, requires plugin Niagara, smoke)

Adds a spawn-count scalability override for the given quality levels.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
index	integer	Override index for remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic.
spawnCountScale	number	Spawn count multiplier for the override (add); negative leaves the spawn count unscaled. Default 1.0f.

Returns: handle, qualityLevelMask, overrides, count, message, compileStatus.

niagara.add_emitter_version (risk 2, mutates, UE 5.1+, requires plugin Niagara, smoke)

Adds a version (major >= 1, not 1.0, not existing) copied from the closest lower version.

Argument	Type	Description
emitterAsset	string	required. Standalone emitter asset path.
version	string	Version selector: GUID or major.minor.
major	integer	Major version for add_emitter_version (>= 1). Default 1.
minor	integer	Minor version for add_emitter_version. Default 1.

Returns: asset, versioningEnabled, exposedVersion, versions, count, message.

niagara.add_event_handler (risk 2, mutates, requires plugin Niagara, smoke)

Adds an event handler (event receiver) with a new, empty event script stack, like the stack's Add Event Handler action; returns the handlers with their usage ids. Add modules to the new stack with the module tools (script event:).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
handler	string	Event handler index or script usage GUID (get/remove).
sourceEmitter	string	Emitter handle that generates the events (name, index or id; add).
eventName	string	Source event name, e.g. LocationEvent, DeathEvent, CollisionEvent (add).
executionMode	string	everyParticle, spawnedParticles, or singleParticle. Default TEXT("everyParticle").
spawnNumber	integer	Spawn count for spawned-particles execution. Default 0.
maxEventsPerFrame	integer	Maximum events consumed per frame (0 = unlimited). Default 0.

Returns: name, properties, eventHandlers, simulationStages, count, message, handlers, handle.

niagara.add_material_override (risk 2, mutates, requires plugin Niagara, smoke)

Appends a material override slot to a mesh renderer and turns bOverrideMaterials on.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Mesh renderer index; empty means the only mesh renderer.
index	integer	Override slot index (set/remove). Default -1.
material	string	Material asset path (add/set).

Returns: renderer, overrideMaterials, overrides, count, message.

niagara.add_module (risk 2, mutates, UE 5.1+, requires plugin Niagara, smoke)

Adds a module script to any stack (system, emitter, particle, event:, stage:) at an index; returns the new module GUID and the stack. UE 5.1+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index; empty for systemSpawn/systemUpdate.
moduleScript	string	required. Niagara module script asset path (usage Module), e.g. /Niagara/Modules/Emitter/SpawnRate.
usage	string	Target stack usage (see list_stacks), default systemSpawn. Default TEXT("systemSpawn").
index	integer	Zero-based insert position in the stack; -1 appends. Default -1.
name	string	Optional suggested module name (made unique by the engine).
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, stacks, module, count, compileStatus, message.

niagara.add_renderer (risk 2, mutates, requires plugin Niagara, smoke)

Adds one or more renderers to an emitter: type is sprite, mesh, ribbon, light, component or decal (UE 5.2+), or a comma-separated list of them.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
type	string	required. sprite, mesh, ribbon, light, component or decal (UE 5.2+), or a comma-separated list of them.

Returns: renderers, count, message.

niagara.add_renderer_mesh (risk 2, mutates, requires plugin Niagara, smoke)

Appends a mesh entry (static mesh, optional scale and pivot offset) to a mesh renderer.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Mesh renderer index; empty means the only mesh renderer.
index	integer	Mesh entry index (set/remove). Default -1.
mesh	string	Static mesh asset path (add/set; empty keeps the current mesh on set).
scale	string	Scale as (X=..,Y=..,Z=..); empty keeps the current value.
pivotOffset	string	Pivot offset as (X=..,Y=..,Z=..); empty keeps the current value.

Returns: renderer, meshes, count, message.

niagara.add_scalability_override (risk 2, mutates, requires plugin Niagara, smoke)

Appends a system scalability override for the given quality levels and turns scalability overriding on; distance/instance fields set their override flags.

Argument	Type	Description
system	string	Niagara system asset path (system overrides) or empty when effectType is given.
effectType	string	Effect type asset path (effect-type tools; empty uses the system's effect type).
index	integer	Entry index for set/remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic. Empty leaves it.
cullByDistance	string	Cull by distance: true/false (empty leaves it). Setting distance fields turns their override on.
maxDistance	string	Maximum distance in cm (empty leaves it).
cullMaxInstanceCount	string	Cull when the effect type exceeds maxInstances: true/false (empty leaves it).
maxInstances	string	Maximum instances of this effect type (empty leaves it).
cullPerSystemMaxInstanceCount	string	Cull when this system exceeds maxSystemInstances: true/false (empty leaves it).
maxSystemInstances	string	Maximum instances of this system (empty leaves it).

Returns: system, effectType, overrideScalability, entries, emitterEntries, fields, count, message.

niagara.add_set_parameters_module (risk 2, mutates, requires plugin Niagara, smoke)

Adds a Set Parameters (assignment) module writing one typed parameter to any stack; returns the module and the stack.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index; empty for systemSpawn/systemUpdate.
usage	string	Target stack usage (see list_stacks), default systemSpawn. Default TEXT("systemSpawn").
name	string	required. Parameter to write. Without a namespace the stack's own namespace is used (System., Emitter. or Particles.).
type	string	float, int, bool, vec2, vec3, vec4, quat or color. Default TEXT("float").
value	string	Default value in the pin text format (e.g. 1.0, (X=1,Y=2,Z=3), (R=1,G=0,B=0,A=1)).
index	integer	Zero-based insert position in the stack; -1 appends. Default -1.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, stacks, module, count, compileStatus, message.

niagara.add_simulation_stage (risk 2, mutates, requires plugin Niagara, smoke)

Adds a generic simulation stage with an empty stack (script + graph output) at an index.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
stage	string	Simulation stage index, script usage GUID or exact name. Empty on get_simulation_stage lists every stage.
name	string	Stage name when adding; new name when setting (empty keeps it).
index	integer	Target zero-based index (add: insert position, -1 appends; move: required destination). Default -1.
enabled	string	true/false to enable or disable the stage; empty keeps it.
iterationSource	string	Particles or DataInterface (DirectSet on engines that have it); empty keeps it.
disablePartialParticleUpdate	string	true/false for Disable Partial Particle Update; empty keeps it.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, emitter, stages, stage, count, compileStatus, message.

niagara.add_user_data_interface (risk 2, mutates, requires plugin Niagara, smoke)

Adds a data interface user parameter of the given class (the data interface object is created with the class defaults).

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.
dataInterfaceClass	string	required. Data interface class, e.g. NiagaraDataInterfaceTexture or NiagaraDataInterfaceCurve (see niagara.list_data_interface_classes).

Returns: owner, parameter, fields, message.

niagara.add_user_parameter (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without User. prefix.
newName	string	New name for rename operations.
type	string	UE type name: float, int, bool, vec2, vec3, vec4, quat, color. Default TEXT("float").
value	string	Text-import default value.

Returns: parameters, count, message.

niagara.add_user_parameters (risk 2, mutates, requires plugin Niagara, smoke)

Adds several user parameters in one call; each entry is "Name:type=value" (type defaults to float, value is optional). Stops at the first failing entry.

Argument	Type	Description
system	string	required. Niagara system asset path.
parameters	array of string	required. Entries "Name:type=value"; type is float, int, bool, vec2, vec3, vec4, quat or color.

Returns: parameters, count, message.

niagara.advance_live_component (risk 2, mutates, requires plugin Niagara, requires PIE)

Runs the simulation of an active PIE Niagara component forward by tickCount ticks of tickDelta seconds, synchronously. Needs a live system instance: a component activated in the current frame has none until the world ticks (Niagara defers activation until the system and its PSOs are ready).

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.
tickCount	integer	required. Number of simulation ticks to run (1-600).
tickDelta	number	Seconds per tick (0-0.5]. Default 0.0333f.

Returns: actor, component, system, world, active, paused, visible, renderingEnabled, tickEnabled, autoActivate, complete, tickBehavior, desiredAge, age, location, particles, emitters, parameters, message.

niagara.apply_stack_issue (risk 2, mutates, UE 5.2+, requires plugin Niagara, smoke)

Applies a stack-issue fix (by issue and fix id/index); with an empty issue applies the first fix of every fixable issue. UE 5.2+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index (only that emitter's stack). Empty = the system stack and every emitter stack.
issue	string	Issue unique id (from list_stack_issues) or zero-based index. Empty: get lists every issue; apply applies the first fix of every fixable issue.
fix	string	Fix unique id or zero-based index within the issue; empty = the issue's first fix (apply_stack_issue).
compile	boolean	Request a system compile after applying fixes (default true). Default true.

Returns: system, issues, issue, applied, count, compileStatus, message.

niagara.audit (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
folder	string	Content folder searched recursively; empty means /Game.
dryRun	boolean	Report what would change without editing. Default true.

Returns: scripts, count, message.

niagara.audit_collection (risk 0, requires plugin Niagara, smoke)

Audits a collection's schema and defaults: parameters outside its namespace, unset objects, and instances whose parameters drifted from the collection.

Argument	Type	Description
collection	string	required. Parameter collection asset path.

Returns: asset, collection, namespace, parameters, related, count, issues, message.

niagara.audit_user_parameters (risk 0, requires plugin Niagara, smoke)

Audits the user parameter schema of a system: every parameter with type and default, plus issues (outside the User namespace, unset object/data interface, duplicate friendly names).

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: owner, parameters, count, issues, message.

niagara.batch_audit_user_parameters (risk 0, requires plugin Niagara, smoke)

Audits the user parameter schema of every system in the folder (namespace, unset objects/data interfaces, duplicate friendly names).

Argument	Type	Description
folder	string	Content folder searched recursively; empty means /Game.
dryRun	boolean	Report what would change without editing. Default true.

Returns: items, processed, changed, failed, dryRun, message.

niagara.batch_compile (risk 2, mutates, requires plugin Niagara, dryRun, smoke)

Requests compilation of every system in the folder; items[] lists each system as changed, wouldChange or failed (with the reason).

Argument	Type	Description
folder	string	Content folder searched recursively; empty means /Game.
dryRun	boolean	Report what would change without editing. Default true.

Returns: items, processed, changed, failed, dryRun, message.

niagara.batch_rename_user_parameter (risk 2, mutates, requires plugin Niagara, dryRun, smoke)

Renames a user parameter on every system in the folder that exposes it and requests compilation (the new name must be free on each system).

Argument	Type	Description
folder	string	Content folder searched recursively; empty means /Game.
name	string	required. Current user parameter name, with or without the User. prefix.
newName	string	required. New user parameter name.
dryRun	boolean	Report what would change without editing. Default true.

Returns: items, processed, changed, failed, dryRun, message.

niagara.batch_replace_material (risk 2, mutates, requires plugin Niagara, dryRun, smoke)

Replaces a material in every renderer material slot (sprite/ribbon/decal Material, mesh override slots) of the folder's systems.

Argument	Type	Description
folder	string	Content folder searched recursively; empty means /Game.
from	string	required. Material to replace (asset path).
to	string	required. Replacement material (asset path).
dryRun	boolean	Report what would change without editing. Default true.

Returns: items, processed, changed, failed, dryRun, message.

niagara.batch_set_fixed_bounds (risk 2, mutates, requires plugin Niagara, dryRun, smoke)

Sets the same fixed bounds on every system in the folder.

Argument	Type	Description
folder	string	Content folder searched recursively; empty means /Game.
min	{x,y,z}	required. Minimum corner.
max	{x,y,z}	required. Maximum corner.
dryRun	boolean	Report what would change without editing. Default true.

Returns: items, processed, changed, failed, dryRun, message.

niagara.batch_set_renderer_field (risk 2, mutates, requires plugin Niagara, dryRun, smoke)

Writes one schema field (list_renderer_fields) on every renderer of a kind in the folder's systems.

Argument	Type	Description
folder	string	Content folder searched recursively; empty means /Game.
kind	string	required. Renderer kind: sprite, mesh, ribbon, light, component or decal (UE 5.2+).
field	string	required. Schema field of that kind (niagara.list_renderer_fields).
value	string	required. Unreal text value.
dryRun	boolean	Report what would change without editing. Default true.

Returns: items, processed, changed, failed, dryRun, message.

niagara.batch_set_scalability (risk 2, mutates, requires plugin Niagara, dryRun, smoke)

Assigns one effect type (the scalability settings container) to every system in the folder; None clears it.

Argument	Type	Description
folder	string	Content folder searched recursively; empty means /Game.
effectType	string	required. Effect type asset path (its scalability settings apply to every system); None clears it.
dryRun	boolean	Report what would change without editing. Default true.

Returns: items, processed, changed, failed, dryRun, message.

niagara.batch_set_user_parameter (risk 2, mutates, requires plugin Niagara, dryRun, smoke)

Sets the default of a user parameter on every system in the folder that exposes it (type-checked; other types fail per asset).

Argument	Type	Description
folder	string	Content folder searched recursively; empty means /Game.
name	string	required. User parameter name, with or without the User. prefix.
type	string	required. float, int, bool, vec2, vec3, vec4, quat or color; systems whose parameter has another type fail.
value	string	required. Unreal text value.
dryRun	boolean	Report what would change without editing. Default true.

Returns: items, processed, changed, failed, dryRun, message.

niagara.batch_validate (risk 0, requires plugin Niagara, smoke)

Validates every system in the folder: system validity, emitters without renderers and every renderer check of niagara.validate_renderers.

Argument	Type	Description
folder	string	Content folder searched recursively; empty means /Game.
dryRun	boolean	Report what would change without editing. Default true.

Returns: items, processed, changed, failed, dryRun, message.

niagara.cancel_compile (risk 2, mutates, requires plugin Niagara, smoke)

Cancels the system's in-flight compilations (they are requested again by the next compile).

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.capture_component_state (risk 0, requires plugin Niagara, requires world, smoke)

Captures the full state of a level Niagara component: asset, activity, pause, visibility, rendering, tick, age, location, particle counts and every override parameter value.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.

Returns: actor, component, system, world, active, paused, visible, renderingEnabled, tickEnabled, autoActivate, complete, tickBehavior, desiredAge, age, location, particles, emitters, parameters, message.

niagara.capture_live_component_state (risk 0, requires plugin Niagara, requires PIE, smoke)

Captures the same state for a Niagara component in the PIE world.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.

Returns: actor, component, system, world, active, paused, visible, renderingEnabled, tickEnabled, autoActivate, complete, tickBehavior, desiredAge, age, location, particles, emitters, parameters, message.

niagara.compile (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.copy_user_parameters (risk 2, mutates, requires plugin Niagara, smoke)

Copies user parameters (definition, default value, object or data interface settings) from one system to another.

Argument	Type	Description
system	string	required. Source Niagara system asset path.
targetSystem	string	required. Destination Niagara system asset path.
names	array of string	User parameter names to copy (with or without User.); empty copies every user parameter.
overwrite	boolean	Replace parameters that already exist on the destination with the same type. Default false.

Returns: owner, parameters, count, issues, message.

niagara.create (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
folder	string	required. Content folder under /Game.
name	string	required. Bare asset name.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.create_effect_type (risk 2, mutates, requires plugin Niagara, smoke)

Creates a Niagara effect type asset (scalability, cull reaction and significance settings shared by systems).

Argument	Type	Description
folder	string	required. Content folder under /Game.
name	string	required. Bare asset name.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.create_emitter_asset (risk 2, mutates, requires plugin Niagara, smoke)

Creates a standalone emitter asset: a copy of parent (asset path or template alias such as Fountain) or, without parent, the editor's default empty emitter.

Argument	Type	Description
folder	string	required. Content folder under /Game.
name	string	required. Bare emitter asset name.
parent	string	Optional parent/template emitter asset path.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.create_from_template (risk 2, mutates, requires plugin Niagara, smoke)

Creates a system as a copy of a template system (engine templates: SimpleExplosion, RadialBurst, DirectionalBurst), exactly like the New System wizard: template description and category are cleared and a compile is requested.

Argument	Type	Description
folder	string	required. Content folder under /Game.
name	string	required. Bare asset name.
template	string	required. Template system path or a bare name under /Niagara/DefaultAssets/Templates/Systems (SimpleExplosion, RadialBurst, DirectionalBurst).

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.create_parameter_collection (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
folder	string	required. Content folder under /Game.
name	string	required. Bare collection name.

Returns: parameters, count, message.

niagara.create_parameter_collection_instance (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
collection	string	required. Parent collection asset path.
folder	string	required. Content folder under /Game.
name	string	required. Bare instance asset name.

Returns: parameters, count, message.

niagara.deactivate (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
system	string	required. Niagara system asset path.
name	string	Component name.

Returns: component, system, active, message.

niagara.deactivate_live_component (risk 2, mutates, requires plugin Niagara, requires PIE, smoke)

Deactivates a Niagara component in the PIE world (existing particles finish).

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.

Returns: actor, component, system, world, active, paused, visible, renderingEnabled, tickEnabled, autoActivate, complete, tickBehavior, desiredAge, age, location, particles, emitters, parameters, message.

niagara.delete (risk 3, mutates, destructive, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: message, compileStatus.

niagara.delete_actor (risk 3, mutates, destructive, requires plugin Niagara, requires world, smoke)

Deletes an editor-level actor that owns a Niagara component (refuses other actors).

Argument	Type	Description
actor	string	required. Actor label/name.

Returns: message, compileStatus.

niagara.delete_emitter_version (risk 3, mutates, destructive, UE 5.1+, requires plugin Niagara, smoke)

Deletes a version (never the exposed version or 1.0).

Argument	Type	Description
emitterAsset	string	required. Standalone emitter asset path.
version	string	Version selector: GUID or major.minor.
major	integer	Major version for add_emitter_version (>= 1). Default 1.
minor	integer	Minor version for add_emitter_version. Default 1.

Returns: asset, versioningEnabled, exposedVersion, versions, count, message.

niagara.diff_emitter (risk 0, requires plugin Niagara, smoke)

Compares two emitter handles (same or different systems): editable emitter data, renderer classes, event handler and simulation stage counts.

Argument	Type	Description
system	string	required. Niagara system asset path of the first emitter.
emitter	string	required. First handle name, index or id.
otherSystem	string	System of the second emitter (empty = same system).
otherEmitter	string	required. Second handle name, index or id.

Returns: a, b, identical, differences, count.

niagara.diff_system (risk 0, requires plugin Niagara, smoke)

Compares two systems: editable system properties, emitter handles present in one only, emitter data per shared handle name, renderer classes and user parameters.

Argument	Type	Description
system	string	required. First Niagara system asset path.
other	string	required. Second Niagara system asset path.

Returns: a, b, identical, differences, count.

niagara.duplicate (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Source system asset path.
folder	string	required. Destination folder.
newName	string	required. Bare destination name.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.duplicate_collection (risk 2, mutates, UE 5.3+, requires plugin Niagara, smoke)

Duplicates a parameter collection; the engine gives the copy a unique namespace (UE 5.3+).

Argument	Type	Description
collection	string	required. Source parameter collection asset path.
folder	string	required. Destination folder under /Game.
newName	string	required. Bare destination asset name.

Returns: asset, collection, namespace, parameters, related, count, issues, message.

niagara.duplicate_emitter (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
newName	string	New handle name for rename.
value	boolean	New enabled/isolated state. Default false.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.duplicate_renderer (risk 2, mutates, requires plugin Niagara, smoke)

Copies a renderer (all settings) into the same or another emitter of the system.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index that owns the renderer.
renderer	string	required. Renderer index to copy.
targetEmitter	string	Destination emitter handle name or index; empty copies inside the same emitter.

Returns: renderers, count, message.

niagara.enable_emitter_versioning (risk 2, mutates, UE 5.1+, requires plugin Niagara, smoke)

Enables versioning on a standalone emitter asset (the current data becomes version 1.0).

Argument	Type	Description
emitterAsset	string	required. Standalone emitter asset path.
version	string	Version selector: GUID or major.minor.
major	integer	Major version for add_emitter_version (>= 1). Default 1.
minor	integer	Minor version for add_emitter_version. Default 1.

Returns: asset, versioningEnabled, exposedVersion, versions, count, message.

niagara.export_recipe (risk 0, requires plugin Niagara, smoke)

Exports a portable recipe (emitters by source asset, emitter and system property overrides, user parameters); optional file writes it as JSON.

Argument	Type	Description
system	string	required. Niagara system asset path.
file	string	Optional absolute .json file to write; empty returns the recipe only.

Returns: recipe, file, asset, handles, message, compileStatus.

niagara.export_summary (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: scripts, count, message.

niagara.expose_emitter_version (risk 2, mutates, UE 5.1+, requires plugin Niagara, smoke)

Makes a version (GUID or major.minor) the exposed one that new users inherit from.

Argument	Type	Description
emitterAsset	string	required. Standalone emitter asset path.
version	string	Version selector: GUID or major.minor.
major	integer	Major version for add_emitter_version (>= 1). Default 1.
minor	integer	Minor version for add_emitter_version. Default 1.

Returns: asset, versioningEnabled, exposedVersion, versions, count, message.

niagara.find_by_data_interface (risk 0, requires plugin Niagara, smoke)

Finds systems that use a data interface class anywhere (user parameters or module inputs).

Argument	Type	Description
dataInterfaceClass	string	required. Data interface class, e.g. NiagaraDataInterfaceTexture.
folder	string	Content folder searched recursively; empty means /Game.

Returns: items, processed, changed, failed, dryRun, message.

niagara.find_by_effect_type (risk 0, requires plugin Niagara, smoke)

Finds systems assigned to an effect type (None finds systems without one).

Argument	Type	Description
effectType	string	required. Effect type asset path; None finds systems without an effect type.
folder	string	Content folder searched recursively; empty means /Game.

Returns: items, processed, changed, failed, dryRun, message.

niagara.find_by_emitter_parent (risk 0, requires plugin Niagara, smoke)

Finds systems whose emitters were created from (inherit) an emitter asset or template.

Argument	Type	Description
emitter	string	required. Emitter asset path (or template name) the system emitters were created from.
folder	string	Content folder searched recursively; empty means /Game.

Returns: items, processed, changed, failed, dryRun, message.

niagara.find_by_material (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
material	string	required. Material asset path.
folder	string	Content folder searched recursively; empty means /Game.

Returns: scripts, count, message.

niagara.find_by_mesh (risk 0, requires plugin Niagara, smoke)

Finds systems whose mesh renderers draw a static mesh.

Argument	Type	Description
mesh	string	required. Static mesh asset path.
folder	string	Content folder searched recursively; empty means /Game.

Returns: items, processed, changed, failed, dryRun, message.

niagara.find_by_parameter (risk 0, requires plugin Niagara, smoke)

Finds systems exposing a user parameter (optionally of one type).

Argument	Type	Description
name	string	required. User parameter name, with or without the User. prefix.
type	string	Optional kit type label to require (float, texture, di:...).
folder	string	Content folder searched recursively; empty means /Game.

Returns: items, processed, changed, failed, dryRun, message.

niagara.find_by_renderer (risk 0, requires plugin Niagara, smoke)

Finds systems with a renderer of a kind (items list emitter and renderer index).

Argument	Type	Description
kind	string	required. Renderer kind: sprite, mesh, ribbon, light, component or decal (UE 5.2+).
folder	string	Content folder searched recursively; empty means /Game.

Returns: items, processed, changed, failed, dryRun, message.

niagara.find_by_script (risk 0, requires plugin Niagara, smoke)

Finds systems whose emitter or system stacks call a module, function or dynamic-input script (loaded graphs, saved or not).

Argument	Type	Description
script	string	required. Niagara module, function or dynamic-input script asset path.
folder	string	Content folder searched recursively; empty means /Game.

Returns: items, processed, changed, failed, dryRun, message.

niagara.find_gpu_systems (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
folder	string	Content folder searched recursively; empty means /Game.
dryRun	boolean	Report what would change without editing. Default true.

Returns: scripts, count, message.

niagara.get (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.get_collection_instance (risk 0, requires plugin Niagara, smoke)

Returns a collection instance: parent collection, namespace, every parameter with value and override flag.

Argument	Type	Description
instance	string	required. Parameter collection instance asset path.

Returns: asset, collection, namespace, parameters, related, count, issues, message.

niagara.get_collection_override (risk 0, requires plugin Niagara, smoke)

Returns one parameter of a collection instance with its override flag and value.

Argument	Type	Description
instance	string	required. Parameter collection instance asset path.
name	string	required. Friendly or full (NPC.) parameter name.

Returns: owner, parameter, fields, message.

niagara.get_collection_parameter (risk 0, requires plugin Niagara, smoke)

Returns a collection parameter with its type and default value (from the collection's default instance).

Argument	Type	Description
collection	string	required. Parameter collection asset path.
name	string	required. Friendly or full (NPC.) parameter name.

Returns: owner, parameter, fields, message.

niagara.get_compile_errors (risk 0, requires plugin Niagara, smoke)

Returns every warning and error of the last compile of all system and emitter scripts.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: events, errorCount, warningCount, compileStatus.

niagara.get_compile_status (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.get_component (risk 0, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
system	string	required. Niagara system asset path.
name	string	Component name.

Returns: component, system, active, message.

niagara.get_component_parameter (risk 0, requires plugin Niagara, requires world, smoke)

Returns one override (instance) parameter of a level Niagara component with its type and value.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.
parameter	string	required. User parameter name, with or without the User. prefix.

Returns: owner, parameter, fields, message.

niagara.get_component_renderer (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Renderer index from niagara.list_renderers; empty means the only renderer of this kind.

Returns: system, emitter, index, kind, class, enabled, fields, changed, message.

niagara.get_decal_renderer (risk 0, UE 5.2+, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Renderer index from niagara.list_renderers; empty means the only renderer of this kind.

Returns: system, emitter, index, kind, class, enabled, fields, changed, message.

niagara.get_dependencies (risk 0, requires plugin Niagara, smoke)

Returns the list of asset packages the system depends on (emitter parents, scripts, materials, meshes, collections, effect type).

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: paths, count, message.

niagara.get_effect_type (risk 0, requires plugin Niagara, smoke)

Returns an effect type (by path, or the system's): update frequency, cull reaction, significance handler, per-quality system settings and emitter spawn scaling.

Argument	Type	Description
system	string	Niagara system asset path (system overrides) or empty when effectType is given.
effectType	string	Effect type asset path (effect-type tools; empty uses the system's effect type).
index	integer	Entry index for set/remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic. Empty leaves it.
cullByDistance	string	Cull by distance: true/false (empty leaves it). Setting distance fields turns their override on.
maxDistance	string	Maximum distance in cm (empty leaves it).
cullMaxInstanceCount	string	Cull when the effect type exceeds maxInstances: true/false (empty leaves it).
maxInstances	string	Maximum instances of this effect type (empty leaves it).
cullPerSystemMaxInstanceCount	string	Cull when this system exceeds maxSystemInstances: true/false (empty leaves it).
maxSystemInstances	string	Maximum instances of this system (empty leaves it).

Returns: system, effectType, overrideScalability, entries, emitterEntries, fields, count, message.

niagara.get_emitter (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.get_emitter_allocation (risk 0, requires plugin Niagara, smoke)

Returns the allocation group: allocation mode, preallocation count and the engine's current max particle count estimate.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.get_emitter_asset (risk 0, requires plugin Niagara, smoke)

Returns a standalone emitter asset: parent, versioning, renderer/event/stage counts, metadata and editable data of the exposed version.

Argument	Type	Description
emitterAsset	string	required. Standalone emitter asset path.
version	string	Version selector: GUID or major.minor.
major	integer	Major version for add_emitter_version (>= 1). Default 1.
minor	integer	Minor version for add_emitter_version. Default 1.

Returns: asset, parent, versioningEnabled, exposedVersion, renderers, eventHandlers, simulationStages, fields, message.

niagara.get_emitter_bounds (risk 0, requires plugin Niagara, smoke)

Returns the bounds group: calculation mode (dynamic/fixed/programmable) and the fixed box.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.get_emitter_execution_order (risk 0, requires plugin Niagara, smoke)

Returns emitter handles in simulation execution order (dependency-sorted by the last compile) with overlap-group starts.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: order, startsNewGroup, count, message.

niagara.get_emitter_inheritance (risk 0, requires plugin Niagara, smoke)

Returns inheritance: parent asset and version, parent snapshot at last merge, synchronization state and the parent's versions (UE 5.1+).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: handle, hasParent, parent, parentVersion, parentAtLastMerge, synchronized, parentVersions, message, compileStatus.

niagara.get_emitter_lifecycle (risk 0, requires plugin Niagara, smoke)

Returns the Emitter State lifecycle inputs that have local values (Loop Duration, Loop Delay, Loop Count...), read from the emitter scripts' rapid-iteration parameters.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.get_emitter_parent (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.get_emitter_scalability (risk 0, requires plugin Niagara, smoke)

Returns the emitter's enabled quality levels and its spawn-count scalability overrides.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: handle, qualityLevelMask, overrides, count, message, compileStatus.

niagara.get_emitter_simulation (risk 0, requires plugin Niagara, smoke)

Returns the simulation group of an emitter: sim target, local space, determinism, seed, interpolated spawning, persistent ids and the engine-specific tick/GPU fields.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.get_event_handler (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
handler	string	Event handler index or script usage GUID (get/remove).
sourceEmitter	string	Emitter handle that generates the events (name, index or id; add).
eventName	string	Source event name, e.g. LocationEvent, DeathEvent, CollisionEvent (add).
executionMode	string	everyParticle, spawnedParticles, or singleParticle. Default TEXT("everyParticle").
spawnNumber	integer	Spawn count for spawned-particles execution. Default 0.
maxEventsPerFrame	integer	Maximum events consumed per frame (0 = unlimited). Default 0.

Returns: name, properties, eventHandlers, simulationStages, count, message, handlers, handle.

niagara.get_light_renderer (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Renderer index from niagara.list_renderers; empty means the only renderer of this kind.

Returns: system, emitter, index, kind, class, enabled, fields, changed, message.

niagara.get_mesh_renderer (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Renderer index from niagara.list_renderers; empty means the only renderer of this kind.

Returns: system, emitter, index, kind, class, enabled, fields, changed, message.

niagara.get_module (risk 0, requires plugin Niagara, smoke)

Returns one module (by GUID, index or unique name) and its stack.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index; empty for systemSpawn/systemUpdate.
usage	string	required. Stack usage, e.g. particleUpdate, emitterUpdate, event:0, stage:0, systemSpawn.
module	string	required. Module node GUID, zero-based index in the stack, or exact unique function name.
enabled	boolean	New enabled state (set_module_enabled). Default true.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, stacks, module, count, compileStatus, message.

niagara.get_module_input (risk 0, UE 5.2+, requires plugin Niagara, smoke)

Returns one module input with its value mode and value. UE 5.2+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index; empty for systemSpawn/systemUpdate.
usage	string	required. Stack usage, e.g. particleUpdate, emitterUpdate, event:0, stage:0, systemSpawn.
module	string	required. Module node GUID, zero-based index in the stack, or exact unique function name.
input	string	Input path: input name or display name (spaces and case ignored); 'Parent/Child' addresses an input of the dynamic input set on Parent. Empty on list_module_inputs lists every input.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, stack, module, inputs, input, count, compileStatus, message.

niagara.get_parameter_collection (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
collection	string	required. Parameter collection asset path.

Returns: parameters, count, message.

niagara.get_particle_counts (risk 0, requires plugin Niagara, requires PIE, smoke)

Returns the per-emitter live particle counts of one PIE Niagara component.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.

Returns: components, count, particles, message.

niagara.get_properties (risk 0, requires plugin Niagara, smoke)

Returns every editable system property (name, C++ type, value text) - the read side of niagara.set_properties.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: target, fields, count, message, compileStatus.

niagara.get_renderer (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind (sprite, mesh, ribbon, light, component, decal) when the emitter has exactly one renderer of that kind.

Returns: renderers, count, message.

niagara.get_renderer_binding (risk 0, requires plugin Niagara, smoke)

Returns one attribute binding of a renderer.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index.
binding	string	required. Binding property name from niagara.list_renderer_bindings, e.g. ColorBinding.
attribute	string	Attribute to bind (set only), e.g. Particles.Color or User.MyColor.

Returns: renderer, kind, bindings, count, message.

niagara.get_renderer_visibility (risk 0, requires plugin Niagara, smoke)

Returns a renderer's visibility tag value, the attribute bound to its visibility tag and its enabled state.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind (sprite, mesh, ribbon, light, component, decal) when the emitter has exactly one renderer of that kind.

Returns: renderer, kind, visibility, tagBinding, enabled, message.

niagara.get_ribbon_renderer (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Renderer index from niagara.list_renderers; empty means the only renderer of this kind.

Returns: system, emitter, index, kind, class, enabled, fields, changed, message.

niagara.get_scalability (risk 0, requires plugin Niagara, smoke)

Returns the system scalability state: effect type, override switch, typed overrides (quality mask + fields), platforms and local-player culling override.

Argument	Type	Description
system	string	Niagara system asset path (system overrides) or empty when effectType is given.
effectType	string	Effect type asset path (effect-type tools; empty uses the system's effect type).
index	integer	Entry index for set/remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic. Empty leaves it.
cullByDistance	string	Cull by distance: true/false (empty leaves it). Setting distance fields turns their override on.
maxDistance	string	Maximum distance in cm (empty leaves it).
cullMaxInstanceCount	string	Cull when the effect type exceeds maxInstances: true/false (empty leaves it).
maxInstances	string	Maximum instances of this effect type (empty leaves it).
cullPerSystemMaxInstanceCount	string	Cull when this system exceeds maxSystemInstances: true/false (empty leaves it).
maxSystemInstances	string	Maximum instances of this system (empty leaves it).

Returns: system, effectType, overrideScalability, entries, emitterEntries, fields, count, message.

niagara.get_script_asset (risk 0, requires plugin Niagara, smoke)

Describes one Niagara script asset: path, class and last compile status.

Argument	Type	Description
script	string	required. Niagara script asset path (get_script_asset) or empty to list every script asset.
filter	string	Optional case-insensitive filter on the asset path or class name (list_script_assets).

Returns: scripts, count, message.

niagara.get_script_source (risk 0, requires plugin Niagara, smoke)

Returns one script (system or emitter, by usage and usage id): source graph class/node count/change id, compile events and its rapid-iteration parameters with values.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name, index or id; empty selects the system scripts.
usage	string	systemSpawn, systemUpdate, emitterSpawn, emitterUpdate, particleSpawn, particleUpdate, event, simulationStage or gpuCompute (list tools: empty = all).
usageId	string	Usage GUID for event and simulation-stage scripts (empty = first of that usage).

Returns: script, sourceClass, graphNodes, graphChangeId, events, parameters.

niagara.get_simulation_stage (risk 0, requires plugin Niagara, smoke)

Returns one simulation stage (index, usage GUID or name) or, with an empty stage, every stage.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
stage	string	Simulation stage index, script usage GUID or exact name. Empty on get_simulation_stage lists every stage.
name	string	Stage name when adding; new name when setting (empty keeps it).
index	integer	Target zero-based index (add: insert position, -1 appends; move: required destination). Default -1.
enabled	string	true/false to enable or disable the stage; empty keeps it.
iterationSource	string	Particles or DataInterface (DirectSet on engines that have it); empty keeps it.
disablePartialParticleUpdate	string	true/false for Disable Partial Particle Update; empty keeps it.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, emitter, stages, stage, count, compileStatus, message.

niagara.get_sprite_renderer (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Renderer index from niagara.list_renderers; empty means the only renderer of this kind.

Returns: system, emitter, index, kind, class, enabled, fields, changed, message.

niagara.get_stack_issue (risk 0, UE 5.2+, requires plugin Niagara, smoke)

Returns one stack issue (by id or index) with its fixes; an empty issue lists every issue. UE 5.2+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index (only that emitter's stack). Empty = the system stack and every emitter stack.
issue	string	Issue unique id (from list_stack_issues) or zero-based index. Empty: get lists every issue; apply applies the first fix of every fixable issue.
fix	string	Fix unique id or zero-based index within the issue; empty = the issue's first fix (apply_stack_issue).
compile	boolean	Request a system compile after applying fixes (default true). Default true.

Returns: system, issues, issue, applied, count, compileStatus, message.

niagara.get_stats (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: valid, emitterCount, bounds, compileStatus, message.

niagara.get_system_bounds (risk 0, requires plugin Niagara, requires PIE, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
system	string	required. Niagara system asset path.
name	string	Component name.

Returns: bounds, message.

niagara.get_system_metadata (risk 0, requires plugin Niagara, smoke)

Returns asset metadata: description, category and library visibility (UE 5.0+) or expose-to-library (UE 4.27), thumbnail state and package metadata tags.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: target, fields, count, message, compileStatus.

niagara.get_system_simulation (risk 0, requires plugin Niagara, smoke)

Returns the simulation settings group: warmup, determinism, random seed and fixed tick (fields that exist on this engine).

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: target, fields, count, message, compileStatus.

niagara.get_user_parameter (risk 0, requires plugin Niagara, smoke)

Returns a user parameter with its type and current default (value, object or data interface).

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.

Returns: owner, parameter, fields, message.

niagara.get_user_parameter_data_interface (risk 0, requires plugin Niagara, smoke)

Returns a data interface user parameter: its class, object and editable fields (Field:Type=Value).

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.

Returns: owner, parameter, fields, message.

niagara.get_user_parameter_material (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.

Returns: owner, parameter, fields, message.

niagara.get_user_parameter_matrix (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.

Returns: owner, parameter, fields, message.

niagara.get_user_parameter_object (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.

Returns: owner, parameter, fields, message.

niagara.get_user_parameter_position (risk 0, UE 5.0+, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.

Returns: owner, parameter, fields, message.

niagara.get_user_parameter_quat (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.

Returns: owner, parameter, fields, message.

niagara.get_user_parameter_render_target (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.

Returns: owner, parameter, fields, message.

niagara.get_user_parameter_static_mesh (risk 0, UE 5.0+, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.

Returns: owner, parameter, fields, message.

niagara.get_user_parameter_texture (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.

Returns: owner, parameter, fields, message.

niagara.get_user_parameter_vec2 (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.

Returns: owner, parameter, fields, message.

niagara.import_recipe (risk 2, mutates, requires plugin Niagara, smoke)

Creates a system from a recipe given inline or as a JSON file written by niagara.export_recipe.

Argument	Type	Description
folder	string	required. Content folder under /Game.
name	string	required. Bare asset name.
recipe	UeaNiagaraSysRecipe	Inline recipe (as returned by niagara.export_recipe). Give either recipe or file.
file	string	Absolute .json file written by niagara.export_recipe. Give either recipe or file.

Returns: recipe, file, asset, handles, message, compileStatus.

niagara.kill_all (risk 2, mutates, requires plugin Niagara, requires PIE, smoke)

Immediately deactivates every Niagara component of the PIE world (optionally only one system) and reports how many were stopped.

Argument	Type	Description
system	string	Only components playing this system (asset path); empty means every Niagara component.

Returns: components, count, particles, message.

niagara.list (risk 0, requires plugin Niagara, smoke)

Lists Niagara systems under a folder with emitter count, effect type and GPU usage.

Argument	Type	Description
folder	string	Folder to search (default /Game). Default TEXT("/Game").
nameContains	string	Only names containing this text (case-insensitive).
recursive	boolean	Include sub-folders. Default true.

Returns: systems, count.

niagara.list_collection_instances (risk 0, requires plugin Niagara, smoke)

Lists the collection instance assets under /Game whose parent is the collection.

Argument	Type	Description
collection	string	required. Parameter collection asset path.

Returns: asset, collection, namespace, parameters, related, count, issues, message.

niagara.list_collection_overrides (risk 0, requires plugin Niagara, smoke)

Lists the parameters a collection instance overrides, with their values.

Argument	Type	Description
instance	string	required. Parameter collection instance asset path.

Returns: asset, collection, namespace, parameters, related, count, issues, message.

niagara.list_component_parameters (risk 0, requires plugin Niagara, requires world, smoke)

Lists the override (instance) parameters of a level Niagara component with their values.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.

Returns: owner, parameters, count, issues, message.

niagara.list_components (risk 0, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
system	string	required. Niagara system asset path.
name	string	Component name.

Returns: components, count, message.

niagara.list_data_interface_classes (risk 0, requires plugin Niagara, smoke)

Lists the data interface classes usable as dataInterfaceClass / di: parameter types.

Argument	Type	Description
name	string	Property name (as declared by the engine).
type	string	C++ type of the property.
value	string	Value as Unreal property text (the same form the setters accept).

Returns: classes, count.

niagara.list_effect_types (risk 0, requires plugin Niagara, smoke)

Lists Niagara effect type assets under a folder.

Argument	Type	Description
folder	string	Folder to search (default /Game). Default TEXT("/Game").
nameContains	string	Only names containing this text (case-insensitive).
recursive	boolean	Include sub-folders. Default true.

Returns: paths, count, message.

niagara.list_emitter_assets (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
name	string	Property name (as declared by the engine).
type	string	C++ type of the property.
value	string	Value as Unreal property text (the same form the setters accept).

Returns: scripts, count, message.

niagara.list_emitter_attributes (risk 0, requires plugin Niagara, smoke)

Lists the particle attributes of the compiled emitter (name and type); compile the system first.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: handle, attributes, count, message.

niagara.list_emitter_properties (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: name, properties, eventHandlers, simulationStages, count, message, handlers, handle.

niagara.list_emitter_versions (risk 0, UE 5.1+, requires plugin Niagara, smoke)

Lists the versions of a standalone emitter asset with the exposed version.

Argument	Type	Description
emitterAsset	string	required. Standalone emitter asset path.
version	string	Version selector: GUID or major.minor.
major	integer	Major version for add_emitter_version (>= 1). Default 1.
minor	integer	Minor version for add_emitter_version. Default 1.

Returns: asset, versioningEnabled, exposedVersion, versions, count, message.

niagara.list_emitters (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: emitters, count, handles.

niagara.list_event_generators (risk 0, requires plugin Niagara, smoke)

Lists the events the emitter's compiled particle scripts generate (event id, payload, max per frame) and which handles consume them.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: handle, generators, count, message.

niagara.list_event_handlers (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: name, properties, eventHandlers, simulationStages, count, message, handlers, handle.

niagara.list_level_components (risk 0, requires plugin Niagara, requires world, smoke)

Lists every Niagara component of the editor level (optionally one system) with actor, system, activity and particle counts.

Argument	Type	Description
system	string	Only components playing this system (asset path); empty means every Niagara component.

Returns: components, count, particles, message.

niagara.list_material_overrides (risk 0, requires plugin Niagara, smoke)

Lists the material override slots of a mesh renderer (OverrideMaterials) and the bOverrideMaterials flag.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Mesh renderer index; empty means the only mesh renderer.
index	integer	Override slot index (set/remove). Default -1.
material	string	Material asset path (add/set).

Returns: renderer, overrideMaterials, overrides, count, message.

niagara.list_module_inputs (risk 0, UE 5.2+, requires plugin Niagara, smoke)

Lists a module's inputs (path, type, value mode, local value, link, dynamic input, data interface). Pass input to list the children of a dynamic input. UE 5.2+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index; empty for systemSpawn/systemUpdate.
usage	string	required. Stack usage, e.g. particleUpdate, emitterUpdate, event:0, stage:0, systemSpawn.
module	string	required. Module node GUID, zero-based index in the stack, or exact unique function name.
input	string	Input path: input name or display name (spaces and case ignored); 'Parent/Child' addresses an input of the dynamic input set on Parent. Empty on list_module_inputs lists every input.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, stack, module, inputs, input, count, compileStatus, message.

niagara.list_modules (risk 0, requires plugin Niagara, smoke)

Lists the modules of one stack (usage) in execution order: GUID, index, name, script, kind, enabled.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index. Empty = system stacks only (list_stacks: system + every emitter).
usage	string	Stack usage (systemSpawn, systemUpdate, emitterSpawn, emitterUpdate, particleSpawn, particleUpdate, event:<i

Returns: system, stacks, module, count, compileStatus, message.

niagara.list_parameter_types (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
name	string	Property name (as declared by the engine).
type	string	C++ type of the property.
value	string	Value as Unreal property text (the same form the setters accept).

Returns: parameters, count, message.

niagara.list_particle_counts (risk 0, requires plugin Niagara, requires PIE, smoke)

Lists every Niagara component of the PIE world (optionally one system) with per-emitter live particle counts.

Argument	Type	Description
system	string	Only components playing this system (asset path); empty means every Niagara component.

Returns: components, count, particles, message.

niagara.list_recipes (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
name	string	Property name (as declared by the engine).
type	string	C++ type of the property.
value	string	Value as Unreal property text (the same form the setters accept).

Returns: scripts, count, message.

niagara.list_renderer_bindings (risk 0, requires plugin Niagara, smoke)

Lists a renderer's attribute bindings with the bound attribute, its type and whether the emitter provides it.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind (sprite, mesh, ribbon, light, component, decal) when the emitter has exactly one renderer of that kind.

Returns: renderer, kind, bindings, count, message.

niagara.list_renderer_fields (risk 0, requires plugin Niagara, smoke)

Lists the settable fields (name and type) and attribute bindings of a renderer kind.

Argument	Type	Description
kind	string	required. Renderer kind: sprite, mesh, ribbon, light, component or decal (UE 5.2+).

Returns: kind, class, fields, bindings.

niagara.list_renderer_meshes (risk 0, requires plugin Niagara, smoke)

Lists the mesh entries of a mesh renderer (mesh, scale, pivot offset).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Mesh renderer index; empty means the only mesh renderer.
index	integer	Mesh entry index (set/remove). Default -1.
mesh	string	Static mesh asset path (add/set; empty keeps the current mesh on set).
scale	string	Scale as (X=..,Y=..,Z=..); empty keeps the current value.
pivotOffset	string	Pivot offset as (X=..,Y=..,Z=..); empty keeps the current value.

Returns: renderer, meshes, count, message.

niagara.list_renderers (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: renderers, count, message.

niagara.list_script_assets (risk 0, requires plugin Niagara, smoke)

Lists Niagara script assets (modules, functions, dynamic inputs), optionally filtered by path or class.

Argument	Type	Description
script	string	required. Niagara script asset path (get_script_asset) or empty to list every script asset.
filter	string	Optional case-insensitive filter on the asset path or class name (list_script_assets).

Returns: scripts, count, message.

niagara.list_simulation_stages (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: name, properties, eventHandlers, simulationStages, count, message, handlers, handle.

niagara.list_stack_issues (risk 0, UE 5.2+, requires plugin Niagara, smoke)

Lists the stack issues (errors, warnings, info) of the system stack and one or every emitter stack, with their fixes. UE 5.2+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index (only that emitter's stack). Empty = the system stack and every emitter stack.
issue	string	Issue unique id (from list_stack_issues) or zero-based index. Empty: get lists every issue; apply applies the first fix of every fixable issue.
fix	string	Fix unique id or zero-based index within the issue; empty = the issue's first fix (apply_stack_issue).
compile	boolean	Request a system compile after applying fixes (default true). Default true.

Returns: system, issues, issue, applied, count, compileStatus, message.

niagara.list_stacks (risk 0, requires plugin Niagara, smoke)

Lists the script stacks (usage selector, usage GUID, modules in order) of the system and of one or every emitter.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index. Empty = system stacks only (list_stacks: system + every emitter).
usage	string	Stack usage (systemSpawn, systemUpdate, emitterSpawn, emitterUpdate, particleSpawn, particleUpdate, event:<i

Returns: system, stacks, module, count, compileStatus, message.

niagara.list_system_scripts (risk 0, requires plugin Niagara, smoke)

Lists the system and emitter scripts with usage, usage id, compile status, VM op count, error/warning counts and rapid-iteration parameter counts.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name, index or id; empty selects the system scripts.
usage	string	systemSpawn, systemUpdate, emitterSpawn, emitterUpdate, particleSpawn, particleUpdate, event, simulationStage or gpuCompute (list tools: empty = all).
usageId	string	Usage GUID for event and simulation-stage scripts (empty = first of that usage).

Returns: scripts, count.

niagara.list_templates (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
name	string	Property name (as declared by the engine).
type	string	C++ type of the property.
value	string	Value as Unreal property text (the same form the setters accept).

Returns: scripts, count, message.

niagara.list_user_parameters (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: parameters, count, message.

niagara.move_simulation_stage (risk 2, mutates, requires plugin Niagara, smoke)

Moves a simulation stage to a new index (execution order).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
stage	string	Simulation stage index, script usage GUID or exact name. Empty on get_simulation_stage lists every stage.
name	string	Stage name when adding; new name when setting (empty keeps it).
index	integer	Target zero-based index (add: insert position, -1 appends; move: required destination). Default -1.
enabled	string	true/false to enable or disable the stage; empty keeps it.
iterationSource	string	Particles or DataInterface (DirectSet on engines that have it); empty keeps it.
disablePartialParticleUpdate	string	true/false for Disable Partial Particle Update; empty keeps it.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, emitter, stages, stage, count, compileStatus, message.

niagara.recipe (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
recipe	string	required. Recipe name from niagara.list_recipes.
folder	string	required. Destination folder under /Game.
name	string	required. Bare system asset name.
dryRun	boolean	Only check that the recipe template exists. Default false.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.recipe_beam (risk 2, mutates, requires plugin Niagara, smoke)

Beam recipe: ribbon beam between two points. Variants: dynamic (default, DynamicBeam), static (StaticBeam).

Argument	Type	Description
folder	string	required. Content folder under /Game.
name	string	required. Bare asset name.
variant	string	Recipe variant (see the tool description; empty = default variant).
gpu	boolean	Simulate the recipe emitters on the GPU. Default false.
localSpace	boolean	Simulate in local space (particles follow the component). Default false.
boundsExtent	number	Half size of fixed system bounds in cm; 0 keeps the recipe default. Default 0.0f.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.recipe_burst (risk 2, mutates, requires plugin Niagara, smoke)

Burst recipe: one-shot sprite burst. Variants: omni (default, OmnidirectionalBurst), directional (DirectionalBurst), sprite (SimpleSpriteBurst), mesh (UpwardMeshBurst).

Argument	Type	Description
folder	string	required. Content folder under /Game.
name	string	required. Bare asset name.
variant	string	Recipe variant (see the tool description; empty = default variant).
gpu	boolean	Simulate the recipe emitters on the GPU. Default false.
localSpace	boolean	Simulate in local space (particles follow the component). Default false.
boundsExtent	number	Half size of fixed system bounds in cm; 0 keeps the recipe default. Default 0.0f.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.recipe_fountain (risk 2, mutates, requires plugin Niagara, smoke)

Fountain recipe: continuous upward sprite fountain (engine Fountain emitter). Variants: default.

Argument	Type	Description
folder	string	required. Content folder under /Game.
name	string	required. Bare asset name.
variant	string	Recipe variant (see the tool description; empty = default variant).
gpu	boolean	Simulate the recipe emitters on the GPU. Default false.
localSpace	boolean	Simulate in local space (particles follow the component). Default false.
boundsExtent	number	Half size of fixed system bounds in cm; 0 keeps the recipe default. Default 0.0f.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.recipe_ribbon (risk 2, mutates, requires plugin Niagara, smoke)

Ribbon recipe: trail ribbon following the component (LocationBasedRibbon).

Argument	Type	Description
folder	string	required. Content folder under /Game.
name	string	required. Bare asset name.
variant	string	Recipe variant (see the tool description; empty = default variant).
gpu	boolean	Simulate the recipe emitters on the GPU. Default false.
localSpace	boolean	Simulate in local space (particles follow the component). Default false.
boundsExtent	number	Half size of fixed system bounds in cm; 0 keeps the recipe default. Default 0.0f.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.recipe_smoke (risk 2, mutates, requires plugin Niagara, smoke)

Smoke/ambient recipe: slow hanging particulates with 2 s warmup so the volume is already filled when it appears (HangingParticulates).

Argument	Type	Description
folder	string	required. Content folder under /Game.
name	string	required. Bare asset name.
variant	string	Recipe variant (see the tool description; empty = default variant).
gpu	boolean	Simulate the recipe emitters on the GPU. Default false.
localSpace	boolean	Simulate in local space (particles follow the component). Default false.
boundsExtent	number	Half size of fixed system bounds in cm; 0 keeps the recipe default. Default 0.0f.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.recipe_sparks (risk 2, mutates, requires plugin Niagara, smoke)

Sparks recipe: an omnidirectional spark burst plus a continuous ember fountain, two handles Sparks and Embers.

Argument	Type	Description
folder	string	required. Content folder under /Game.
name	string	required. Bare asset name.
variant	string	Recipe variant (see the tool description; empty = default variant).
gpu	boolean	Simulate the recipe emitters on the GPU. Default false.
localSpace	boolean	Simulate in local space (particles follow the component). Default false.
boundsExtent	number	Half size of fixed system bounds in cm; 0 keeps the recipe default. Default 0.0f.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.remove_collection_override (risk 2, mutates, requires plugin Niagara, smoke)

Clears an instance override and restores the collection default value.

Argument	Type	Description
instance	string	required. Parameter collection instance asset path.
name	string	required. Friendly or full (NPC.) parameter name.

Returns: owner, parameter, fields, message.

niagara.remove_collection_parameter (risk 3, mutates, destructive, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
collection	string	required. Parameter collection asset path.
name	string	required. Parameter name.
type	string	UE type name. Default TEXT("float").
value	string	Text-import value.

Returns: parameters, count, message.

niagara.remove_effect_type_emitter_scalability (risk 2, mutates, requires plugin Niagara, smoke)

Removes the effect type emitter scaling entry at index.

Argument	Type	Description
system	string	Niagara system asset path (used to find the effect type when effectType is empty).
effectType	string	Effect type asset path.
index	integer	Entry index for remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic.
scaleSpawnCount	boolean	Scale spawn counts on these quality levels. Default true.
spawnCountScale	number	Spawn count multiplier (0..1 typical). Default 1.0f.

Returns: system, effectType, overrideScalability, entries, emitterEntries, fields, count, message.

niagara.remove_effect_type_scalability (risk 2, mutates, requires plugin Niagara, smoke)

Removes the effect type system scalability setting at index.

Argument	Type	Description
system	string	Niagara system asset path (system overrides) or empty when effectType is given.
effectType	string	Effect type asset path (effect-type tools; empty uses the system's effect type).
index	integer	Entry index for set/remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic. Empty leaves it.
cullByDistance	string	Cull by distance: true/false (empty leaves it). Setting distance fields turns their override on.
maxDistance	string	Maximum distance in cm (empty leaves it).
cullMaxInstanceCount	string	Cull when the effect type exceeds maxInstances: true/false (empty leaves it).
maxInstances	string	Maximum instances of this effect type (empty leaves it).
cullPerSystemMaxInstanceCount	string	Cull when this system exceeds maxSystemInstances: true/false (empty leaves it).
maxSystemInstances	string	Maximum instances of this system (empty leaves it).

Returns: system, effectType, overrideScalability, entries, emitterEntries, fields, count, message.

niagara.remove_emitter (risk 3, mutates, destructive, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: message, compileStatus.

niagara.remove_emitter_parent (risk 2, mutates, requires plugin Niagara, smoke)

Breaks inheritance: the emitter keeps its current stack but no longer follows a parent.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: handle, hasParent, parent, parentVersion, parentAtLastMerge, synchronized, parentVersions, message, compileStatus.

niagara.remove_emitter_scalability_override (risk 2, mutates, requires plugin Niagara, smoke)

Removes the emitter scalability override at index.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
index	integer	Override index for remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic.
spawnCountScale	number	Spawn count multiplier for the override (add); negative leaves the spawn count unscaled. Default 1.0f.

Returns: handle, qualityLevelMask, overrides, count, message, compileStatus.

niagara.remove_event_handler (risk 3, mutates, destructive, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
handler	string	Event handler index or script usage GUID (get/remove).
sourceEmitter	string	Emitter handle that generates the events (name, index or id; add).
eventName	string	Source event name, e.g. LocationEvent, DeathEvent, CollisionEvent (add).
executionMode	string	everyParticle, spawnedParticles, or singleParticle. Default TEXT("everyParticle").
spawnNumber	integer	Spawn count for spawned-particles execution. Default 0.
maxEventsPerFrame	integer	Maximum events consumed per frame (0 = unlimited). Default 0.

Returns: name, properties, eventHandlers, simulationStages, count, message, handlers, handle.

niagara.remove_material_override (risk 3, mutates, destructive, requires plugin Niagara, smoke)

Removes one override slot (index); bOverrideMaterials is turned off when the list becomes empty.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Mesh renderer index; empty means the only mesh renderer.
index	integer	Override slot index (set/remove). Default -1.
material	string	Material asset path (add/set).

Returns: renderer, overrideMaterials, overrides, count, message.

niagara.remove_module (risk 3, mutates, destructive, UE 5.2+, requires plugin Niagara, smoke)

Deletes a module and its input nodes through the stack view model (the stack's Delete). UE 5.2+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index; empty for systemSpawn/systemUpdate.
usage	string	required. Stack usage, e.g. particleUpdate, emitterUpdate, event:0, stage:0, systemSpawn.
module	string	required. Module node GUID, zero-based index in the stack, or exact unique function name.
enabled	boolean	New enabled state (set_module_enabled). Default true.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, stacks, module, count, compileStatus, message.

niagara.remove_renderer (risk 3, mutates, destructive, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind (sprite, mesh, ribbon, light, component, decal) when the emitter has exactly one renderer of that kind.

Returns: message, compileStatus.

niagara.remove_renderer_mesh (risk 3, mutates, destructive, requires plugin Niagara, smoke)

Removes one mesh entry (index) from a mesh renderer.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Mesh renderer index; empty means the only mesh renderer.
index	integer	Mesh entry index (set/remove). Default -1.
mesh	string	Static mesh asset path (add/set; empty keeps the current mesh on set).
scale	string	Scale as (X=..,Y=..,Z=..); empty keeps the current value.
pivotOffset	string	Pivot offset as (X=..,Y=..,Z=..); empty keeps the current value.

Returns: renderer, meshes, count, message.

niagara.remove_scalability_override (risk 2, mutates, requires plugin Niagara, smoke)

Removes the system scalability override at index.

Argument	Type	Description
system	string	Niagara system asset path (system overrides) or empty when effectType is given.
effectType	string	Effect type asset path (effect-type tools; empty uses the system's effect type).
index	integer	Entry index for set/remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic. Empty leaves it.
cullByDistance	string	Cull by distance: true/false (empty leaves it). Setting distance fields turns their override on.
maxDistance	string	Maximum distance in cm (empty leaves it).
cullMaxInstanceCount	string	Cull when the effect type exceeds maxInstances: true/false (empty leaves it).
maxInstances	string	Maximum instances of this effect type (empty leaves it).
cullPerSystemMaxInstanceCount	string	Cull when this system exceeds maxSystemInstances: true/false (empty leaves it).
maxSystemInstances	string	Maximum instances of this system (empty leaves it).

Returns: system, effectType, overrideScalability, entries, emitterEntries, fields, count, message.

niagara.remove_simulation_stage (risk 3, mutates, destructive, requires plugin Niagara, smoke)

Removes a simulation stage and the graph nodes of its stack.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
stage	string	Simulation stage index, script usage GUID or exact name. Empty on get_simulation_stage lists every stage.
name	string	Stage name when adding; new name when setting (empty keeps it).
index	integer	Target zero-based index (add: insert position, -1 appends; move: required destination). Default -1.
enabled	string	true/false to enable or disable the stage; empty keeps it.
iterationSource	string	Particles or DataInterface (DirectSet on engines that have it); empty keeps it.
disablePartialParticleUpdate	string	true/false for Disable Partial Particle Update; empty keeps it.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, emitter, stages, stage, count, compileStatus, message.

niagara.remove_user_parameter (risk 3, mutates, destructive, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without User. prefix.
newName	string	New name for rename operations.
type	string	UE type name: float, int, bool, vec2, vec3, vec4, quat, color. Default TEXT("float").
value	string	Text-import default value.

Returns: parameters, count, message.

niagara.rename (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Source system asset path.
folder	string	required. Destination folder.
newName	string	required. Bare destination name.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.rename_collection_parameter (risk 2, mutates, requires plugin Niagara, smoke)

Renames a collection parameter (friendly name; the namespace is kept) in the collection, its default instance and every instance asset. Same name is a no-op.

Argument	Type	Description
collection	string	required. Parameter collection asset path.
name	string	required. Current friendly or full (NPC.) name.
newName	string	required. New friendly name (the collection namespace is added).

Returns: asset, collection, namespace, parameters, related, count, issues, message.

niagara.rename_emitter (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
newName	string	New handle name for rename.
value	boolean	New enabled/isolated state. Default false.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.rename_user_parameter (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without User. prefix.
newName	string	New name for rename operations.
type	string	UE type name: float, int, bool, vec2, vec3, vec4, quat, color. Default TEXT("float").
value	string	Text-import default value.

Returns: parameters, count, message.

niagara.reorder_emitter (risk 2, mutates, requires plugin Niagara, smoke)

Moves an emitter handle to a new position in the system (handle ids, names and data are preserved); returns the handles in the new order.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
index	integer	required. Destination zero-based emitter index.

Returns: emitters, count, handles.

niagara.reorder_renderer (risk 2, mutates, UE 5.2+, requires plugin Niagara, smoke)

Moves a renderer to another index of its emitter's renderer list (UE 5.2+).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index to move.
newIndex	integer	required. Destination index in the emitter's renderer list.

Returns: renderers, count, message.

niagara.reset_component (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
system	string	required. Niagara system asset path.
name	string	Component name.

Returns: component, system, active, message.

niagara.reset_live_component (risk 2, mutates, requires plugin Niagara, requires PIE, smoke)

Resets the simulation of a Niagara component in the PIE world.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.

Returns: actor, component, system, world, active, paused, visible, renderingEnabled, tickEnabled, autoActivate, complete, tickBehavior, desiredAge, age, location, particles, emitters, parameters, message.

niagara.reset_module_input (risk 2, mutates, UE 5.2+, requires plugin Niagara, smoke)

Resets a module input to its default (removes overrides, links, dynamic inputs and data interfaces). UE 5.2+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index; empty for systemSpawn/systemUpdate.
usage	string	required. Stack usage, e.g. particleUpdate, emitterUpdate, event:0, stage:0, systemSpawn.
module	string	required. Module node GUID, zero-based index in the stack, or exact unique function name.
input	string	Input path: input name or display name (spaces and case ignored); 'Parent/Child' addresses an input of the dynamic input set on Parent. Empty on list_module_inputs lists every input.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, stack, module, inputs, input, count, compileStatus, message.

niagara.reset_renderer_binding (risk 2, mutates, requires plugin Niagara, smoke)

Resets one attribute binding to the renderer class default.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index.
binding	string	required. Binding property name from niagara.list_renderer_bindings, e.g. ColorBinding.
attribute	string	Attribute to bind (set only), e.g. Particles.Color or User.MyColor.

Returns: renderer, kind, bindings, count, message.

niagara.save (risk 2, requires plugin Niagara)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: message, compileStatus.

niagara.seek_live_component (risk 2, mutates, requires plugin Niagara, requires PIE, smoke)

Seeks a PIE Niagara component to a simulation age in seconds (value).

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
value	number	required. New value.

Returns: actor, component, system, world, active, paused, visible, renderingEnabled, tickEnabled, autoActivate, complete, tickBehavior, desiredAge, age, location, particles, emitters, parameters, message.

niagara.set_collection_instance_parameter (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
instance	string	required. Collection instance asset path.
name	string	required. Parameter name.
type	string	UE type name. Default TEXT("float").
value	string	Text-import value.

Returns: parameters, count, message.

niagara.set_collection_instance_parent (risk 2, mutates, requires plugin Niagara, smoke)

Re-parents a collection instance asset to another collection.

Argument	Type	Description
instance	string	required. Parameter collection instance asset path.
collection	string	required. New parent collection asset path.

Returns: asset, collection, namespace, parameters, related, count, issues, message.

niagara.set_collection_override (risk 2, mutates, requires plugin Niagara, smoke)

Marks a collection instance parameter as overridden and optionally sets its value (typed by the collection parameter).

Argument	Type	Description
instance	string	required. Parameter collection instance asset path.
name	string	required. Friendly or full (NPC.) parameter name.
value	string	Unreal text value; the type comes from the collection parameter. Empty keeps the current value.

Returns: owner, parameter, fields, message.

niagara.set_collection_parameter (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
collection	string	required. Parameter collection asset path.
name	string	required. Parameter name.
type	string	UE type name. Default TEXT("float").
value	string	Text-import value.

Returns: parameters, count, message.

niagara.set_collection_parameter_bool (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
collection	string	required. Parameter collection asset path.
name	string	required. Parameter name.
type	string	UE type name. Default TEXT("float").
value	string	Text-import value.

Returns: parameters, count, message.

niagara.set_collection_parameter_color (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
collection	string	required. Parameter collection asset path.
name	string	required. Parameter name.
type	string	UE type name. Default TEXT("float").
value	string	Text-import value.

Returns: parameters, count, message.

niagara.set_collection_parameter_float (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
collection	string	required. Parameter collection asset path.
name	string	required. Parameter name.
type	string	UE type name. Default TEXT("float").
value	string	Text-import value.

Returns: parameters, count, message.

niagara.set_collection_parameter_vector (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
collection	string	required. Parameter collection asset path.
name	string	required. Parameter name.
type	string	UE type name. Default TEXT("float").
value	string	Text-import value.

Returns: parameters, count, message.

niagara.set_component_actor (risk 2, mutates, requires plugin Niagara, requires world, smoke)

Assigns an actor of the level to an object user parameter of a level Niagara component (SetVariableActor).

Argument	Type	Description
actor	string	required. Actor label/name that owns the Niagara component.
name	string	Niagara component name; may be omitted when the actor owns exactly one.
parameter	string	required. Object user parameter name, with or without the User. prefix.
targetActor	string	required. Label/name of the actor to assign.

Returns: owner, parameter, fields, message.

niagara.set_component_age (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
value	number	required. New value.

Returns: component, system, active, message.

niagara.set_component_asset (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
system	string	required. Niagara system asset path.

Returns: component, system, active, message.

niagara.set_component_auto_activate (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
property	string	required. Variable name or reflected property.
type	string	UE type name. Default TEXT("float").
value	string	required. Text-import value.

Returns: component, system, active, message.

niagara.set_component_bool (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
property	string	required. Variable name or reflected property.
type	string	UE type name. Default TEXT("float").
value	string	required. Text-import value.

Returns: component, system, active, message.

niagara.set_component_color (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
property	string	required. Variable name or reflected property.
type	string	UE type name. Default TEXT("float").
value	string	required. Text-import value.

Returns: component, system, active, message.

niagara.set_component_float (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
property	string	required. Variable name or reflected property.
type	string	UE type name. Default TEXT("float").
value	string	required. Text-import value.

Returns: component, system, active, message.

niagara.set_component_int (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
property	string	required. Variable name or reflected property.
type	string	UE type name. Default TEXT("float").
value	string	required. Text-import value.

Returns: component, system, active, message.

niagara.set_component_object (risk 2, mutates, requires plugin Niagara, requires world, smoke)

Sets an object, material, render-target, texture (UE 5.0+) or static mesh (UE 5.0+) user parameter on a level Niagara component; the setter follows the parameter's type.

Argument	Type	Description
actor	string	required. Actor label/name that owns the Niagara component.
name	string	Niagara component name; may be omitted when the actor owns exactly one.
parameter	string	required. Object, texture, material, static mesh or render-target user parameter name.
asset	string	required. Asset path or unique asset name.

Returns: owner, parameter, fields, message.

niagara.set_component_parameter (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
property	string	required. Variable name or reflected property.
type	string	UE type name. Default TEXT("float").
value	string	required. Text-import value.

Returns: component, system, active, message.

niagara.set_component_quat (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
property	string	required. Variable name or reflected property.
type	string	UE type name. Default TEXT("float").
value	string	required. Text-import value.

Returns: component, system, active, message.

niagara.set_component_renderer (risk 2, mutates, requires plugin Niagara, smoke)

Writes component renderer fields (ComponentType class, ComponentCountLimit, particle-ID assignment, visualization).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Renderer index from niagara.list_renderers; empty means the only renderer of this kind.
values	array of string	required. Field=Value entries; fields come from niagara.list_renderer_fields for this kind. Object fields take asset paths or None.
addIfMissing	boolean	Add a renderer of this kind to the emitter when it has none. Default false.

Returns: system, emitter, index, kind, class, enabled, fields, changed, message.

niagara.set_component_rendering_enabled (risk 2, mutates, requires plugin Niagara, requires world, smoke)

Turns rendering of a level Niagara component on or off while the simulation keeps running.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.
enabled	boolean	required. New flag value.

Returns: actor, component, system, world, active, paused, visible, renderingEnabled, tickEnabled, autoActivate, complete, tickBehavior, desiredAge, age, location, particles, emitters, parameters, message.

niagara.set_component_template (risk 2, mutates, requires plugin Niagara, smoke)

Sets the component renderer's template component (TemplateComponent object text; None clears it).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_component_tick_enabled (risk 2, mutates, requires plugin Niagara, requires world, smoke)

Enables or disables ticking of a level Niagara component and optionally sets its tick behavior (UsePrereqs, UseComponentTickGroup, ForceTickFirst, ForceTickLast).

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.
enabled	boolean	required. Enable (true) or disable (false) component ticking.
tickBehavior	string	Optional tick behavior: UsePrereqs, UseComponentTickGroup, ForceTickFirst or ForceTickLast. Empty keeps it.

Returns: actor, component, system, world, active, paused, visible, renderingEnabled, tickEnabled, autoActivate, complete, tickBehavior, desiredAge, age, location, particles, emitters, parameters, message.

niagara.set_component_vec3 (risk 2, mutates, requires plugin Niagara, requires world, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
property	string	required. Variable name or reflected property.
type	string	UE type name. Default TEXT("float").
value	string	required. Text-import value.

Returns: component, system, active, message.

niagara.set_component_visibility (risk 2, mutates, requires plugin Niagara, requires world, smoke)

Shows or hides a level Niagara component (optionally its attached children too).

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.
visible	boolean	required. Show (true) or hide (false) the component.
propagateToChildren	boolean	Apply the visibility to attached children too. Default false.

Returns: actor, component, system, world, active, paused, visible, renderingEnabled, tickEnabled, autoActivate, complete, tickBehavior, desiredAge, age, location, particles, emitters, parameters, message.

niagara.set_data_interface_input (risk 2, mutates, UE 5.7+, requires plugin Niagara, smoke)

Sets a data-interface input to a new data interface of the given class, optionally with property values (5.8+). UE 5.7+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index; empty for systemSpawn/systemUpdate.
usage	string	required. Stack usage, e.g. particleUpdate, emitterUpdate, event:0, stage:0, systemSpawn.
module	string	required. Module node GUID, zero-based index in the stack, or exact unique function name.
input	string	required. Input path of a data-interface input (see list_module_inputs).
dataInterfaceClass	string	required. Data-interface class, e.g. NiagaraDataInterfaceCurve. Must derive from the input's type.
properties	array of string	Optional 'Property=Value' pairs applied to the new data interface (UE text import). UE 5.8+.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, stack, module, inputs, input, count, compileStatus, message.

niagara.set_decal_renderer (risk 2, mutates, UE 5.2+, requires plugin Niagara, smoke)

Writes decal renderer fields (Material, SourceMode, RendererVisibility, DecalScreenSizeFade); UE 5.2+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Renderer index from niagara.list_renderers; empty means the only renderer of this kind.
values	array of string	required. Field=Value entries; fields come from niagara.list_renderer_fields for this kind. Object fields take asset paths or None.
addIfMissing	boolean	Add a renderer of this kind to the emitter when it has none. Default false.

Returns: system, emitter, index, kind, class, enabled, fields, changed, message.

niagara.set_determinism (risk 2, mutates, UE 5.0+, requires plugin Niagara, smoke)

Enables deterministic simulation for the whole system (system-level determinism exists from UE 5.0).

Argument	Type	Description
system	string	required. Niagara system asset path.
value	boolean	New flag value. Default false.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_dynamic_input (risk 2, mutates, UE 5.2+, requires plugin Niagara, smoke)

Drives a module input with a dynamic-input script; its own inputs become 'Input/Child' paths. UE 5.2+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index; empty for systemSpawn/systemUpdate.
usage	string	required. Stack usage, e.g. particleUpdate, emitterUpdate, event:0, stage:0, systemSpawn.
module	string	required. Module node GUID, zero-based index in the stack, or exact unique function name.
input	string	required. Input path (see list_module_inputs).
dynamicInputScript	string	required. Dynamic-input script asset path, e.g. /Niagara/DynamicInputs/UniformRange/UniformRangedFloat. Must be one of the dynamic inputs the stack offers for the input's type.
name	string	Optional suggested node name.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, stack, module, inputs, input, count, compileStatus, message.

niagara.set_effect_type (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
effectType	string	Effect type asset path. Empty clears it.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_effect_type_scalability (risk 2, mutates, requires plugin Niagara, smoke)

Edits the effect type system scalability setting at index (only the given fields change).

Argument	Type	Description
system	string	Niagara system asset path (system overrides) or empty when effectType is given.
effectType	string	Effect type asset path (effect-type tools; empty uses the system's effect type).
index	integer	Entry index for set/remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic. Empty leaves it.
cullByDistance	string	Cull by distance: true/false (empty leaves it). Setting distance fields turns their override on.
maxDistance	string	Maximum distance in cm (empty leaves it).
cullMaxInstanceCount	string	Cull when the effect type exceeds maxInstances: true/false (empty leaves it).
maxInstances	string	Maximum instances of this effect type (empty leaves it).
cullPerSystemMaxInstanceCount	string	Cull when this system exceeds maxSystemInstances: true/false (empty leaves it).
maxSystemInstances	string	Maximum instances of this system (empty leaves it).

Returns: system, effectType, overrideScalability, entries, emitterEntries, fields, count, message.

niagara.set_effect_type_settings (risk 2, mutates, requires plugin Niagara, smoke)

Sets effect type scalars: update frequency, cull reaction and (UE 5.0+) local-player culling.

Argument	Type	Description
system	string	Niagara system asset path (used when effectType is empty).
effectType	string	Effect type asset path.
updateFrequency	string	SpawnOnly, Low, Medium, High or Continuous (empty leaves it).
cullReaction	string	Deactivate, DeactivateImmediate, DeactivateResume or DeactivateImmediateResume (empty leaves it).
allowCullingForLocalPlayers	string	true/false: allow scalability culling of effects owned by local players (UE 5.0+; empty leaves it).

Returns: system, effectType, overrideScalability, entries, emitterEntries, fields, count, message.

niagara.set_emitter_allocation (risk 2, mutates, requires plugin Niagara, smoke)

Sets allocation mode (AutomaticEstimate, ManualEstimate, FixedCount on UE 5.0+) and preallocation count.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
allocationMode	string	AutomaticEstimate, ManualEstimate or FixedCount (FixedCount UE 5.0+); empty leaves it.
preAllocationCount	string	Particles to preallocate for manual modes; empty leaves it.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_allocation_mode (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_asset_metadata (risk 2, mutates, requires plugin Niagara, smoke)

Sets standalone emitter asset metadata: description, category, library visibility and (UE 5.4+) inheritable.

Argument	Type	Description
emitterAsset	string	required. Standalone emitter asset path.
description	string	Asset description (empty leaves it; "none" clears it).
category	string	Library category (empty leaves it; "none" clears it).
libraryVisibility	string	Unexposed, Library or Hidden (UE 5.0+); UE 4.27 accepts Unexposed or Library. Empty leaves it.
inheritable	string	true/false: other emitters may inherit from this one (UE 5.4+); empty leaves it.

Returns: asset, parent, versioningEnabled, exposedVersion, renderers, eventHandlers, simulationStages, fields, message.

niagara.set_emitter_bounds (risk 2, mutates, requires plugin Niagara, smoke)

Sets the bounds mode and/or fixed box (box written when min and max differ).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
mode	string	dynamic or fixed (programmable on UE 5.1+); empty leaves it.
min	{x,y,z}	Minimum corner of the fixed box; the box is written when min and max differ.
max	{x,y,z}	Maximum corner of the fixed box.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_bounds_calculation (risk 2, mutates, requires plugin Niagara, smoke)

Bounds calculation: Dynamic or Fixed (UE 5.1+ also Programmable); older engines map it to bFixedBounds.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_determinism (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_enabled (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
newName	string	New handle name for rename.
value	boolean	New enabled/isolated state. Default false.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_event_generator (risk 2, mutates, requires plugin Niagara, smoke)

Replaces the emitter's event handler array (EventHandlerScriptProps) with Unreal property text; () clears it.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_fixed_bounds (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_gpu_spawn_limit (risk 2, mutates, UE 5.0+, requires plugin Niagara, smoke)

Maximum GPU particles spawned per frame (UE 5.0+).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_interpolation (risk 2, mutates, requires plugin Niagara, smoke)

Interpolated spawning: true/false, or on UE 5.6+ an ENiagaraInterpolatedSpawnMode name (NoInterpolation, RunUpdateScript, Interpolation).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_isolated (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
newName	string	New handle name for rename.
value	boolean	New enabled/isolated state. Default false.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_lifecycle (risk 2, mutates, requires plugin Niagara, smoke)

Sets Emitter State lifecycle values (loop duration/delay/count, delay-first-loop, recalculate-each-loop) exactly as the stack's local value editor does; requests a compile.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
loopDuration	string	Emitter State "Loop Duration" seconds; empty leaves it.
loopDelay	string	Emitter State "Loop Delay" seconds; empty leaves it.
loopCount	string	Emitter State "Loop Count" (loop behavior Multiple only); empty leaves it.
delayFirstLoopOnly	string	Emitter State "Delay First Loop Only" true/false; empty leaves it.
recalculateDurationEachLoop	string	Emitter State "Recalculate Duration Each Loop" true/false; empty leaves it.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_local_space (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_parent (risk 2, mutates, requires plugin Niagara, smoke)

Reparents an emitter to another emitter asset and merges the parent's stack, as the editor's Update Parent Emitter action does.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
parent	string	New parent emitter asset path (set_emitter_parent).
version	string	Parent version: GUID or major.minor (set_emitter_parent_version; set_emitter_parent defaults to the exposed version).

Returns: handle, hasParent, parent, parentVersion, parentAtLastMerge, synchronized, parentVersions, message, compileStatus.

niagara.set_emitter_parent_version (risk 2, mutates, UE 5.1+, requires plugin Niagara, smoke)

Switches the parent version the emitter inherits from and merges it (parent must use versioning).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
parent	string	New parent emitter asset path (set_emitter_parent).
version	string	Parent version: GUID or major.minor (set_emitter_parent_version; set_emitter_parent defaults to the exposed version).

Returns: handle, hasParent, parent, parentVersion, parentAtLastMerge, synchronized, parentVersions, message, compileStatus.

niagara.set_emitter_persistent_ids (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_platforms (risk 2, mutates, requires plugin Niagara, smoke)

Restricts the emitter to the given effect quality levels (all = every level).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
index	integer	Override index for remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic.
spawnCountScale	number	Spawn count multiplier for the override (add); negative leaves the spawn count unscaled. Default 1.0f.

Returns: handle, qualityLevelMask, overrides, count, message, compileStatus.

niagara.set_emitter_preallocation (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_properties (risk 2, mutates, requires plugin Niagara, smoke)

Sets a reflected emitter property (versioned emitter data on UE 5.1+, the emitter object before) from Unreal property text.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_random_seed (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_scalability (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_sim_stage_enabled (risk 2, mutates, UE ≤4.27, requires plugin Niagara, smoke)

Enables simulation stages on the emitter (the switch exists on UE 4.27 only; later engines always enable them).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_simulation (risk 2, mutates, requires plugin Niagara, smoke)

Sets the simulation group in one validated transaction (only given fields change; fields missing on this engine return E_NOT_SUPPORTED). Requests a compile.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
simTarget	string	CPUSim or GPUComputeSim (also cpu/gpu); empty leaves it.
localSpace	string	true/false simulate in local space; empty leaves it.
determinism	string	true/false deterministic random numbers; empty leaves it.
randomSeed	string	Random seed used when deterministic; empty leaves it.
interpolatedSpawn	string	true/false interpolated spawning; empty leaves it.
requiresPersistentIds	string	true/false persistent particle ids; empty leaves it.
maxGpuParticlesSpawnPerFrame	string	GPU particles spawned per frame limit (UE 5.0+); empty leaves it.
combineEventSpawn	string	true/false combine event spawns (UE 4.27 to 5.2); empty leaves it.
maxDeltaTimePerTick	string	Maximum delta time per tick in seconds, 0 removes the limit (UE 4.27 to 5.2); empty leaves it.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_emitter_simulation_target (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.
property	string	required. Reflected emitter data property, for example SimTarget or bLocalSpace.
value	string	required. UE text-import value.

Returns: name, asset, enabled, isolated, parent, message, handle, fields, compileStatus.

niagara.set_event_handler (risk 2, mutates, requires plugin Niagara, smoke)

Edits an event handler's source emitter/event, execution mode, spawn counts and event budget.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
handler	string	required. Event handler index or script usage GUID.
sourceEmitter	string	Source emitter handle name or index whose events are received; empty keeps the current source.
sourceEventName	string	Source event name, e.g. LocationEvent, DeathEvent, CollisionEvent; empty keeps it.
executionMode	string	everyParticle, spawnedParticles or singleParticle; empty keeps it.
spawnNumber	integer	Particles spawned per event (spawnedParticles mode); -1 keeps it. Default -1.
maxEventsPerFrame	integer	Maximum events consumed per frame (0 = unlimited); -1 keeps it. Default -1.
randomSpawnNumber	string	true/false to spawn a random count between minSpawnNumber and spawnNumber; empty keeps it.
minSpawnNumber	integer	Minimum random spawn count; -1 keeps it. Default -1.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, emitter, handlers, handler, count, compileStatus, message.

niagara.set_fixed_bounds (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
min	{x,y,z}	required. Minimum fixed-bound coordinate.
max	{x,y,z}	required. Maximum fixed-bound coordinate.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_light_color (risk 2, mutates, requires plugin Niagara, smoke)

Sets the light renderer's color offset added to the particle color (ColorAdd, vector text).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_light_radius (risk 2, mutates, requires plugin Niagara, smoke)

Sets the light renderer's radius scale (RadiusScale).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_light_renderer (risk 2, mutates, requires plugin Niagara, smoke)

Writes light renderer fields (RadiusScale, DefaultExponent, ColorAdd, falloff and translucency flags...).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Renderer index from niagara.list_renderers; empty means the only renderer of this kind.
values	array of string	required. Field=Value entries; fields come from niagara.list_renderer_fields for this kind. Object fields take asset paths or None.
addIfMissing	boolean	Add a renderer of this kind to the emitter when it has none. Default false.

Returns: system, emitter, index, kind, class, enabled, fields, changed, message.

niagara.set_linked_input (risk 2, mutates, UE 5.6+, requires plugin Niagara, smoke)

Links a module input to a namespaced parameter (User., Engine., Emitter., Particles., System.). UE 5.6+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index; empty for systemSpawn/systemUpdate.
usage	string	required. Stack usage, e.g. particleUpdate, emitterUpdate, event:0, stage:0, systemSpawn.
module	string	required. Module node GUID, zero-based index in the stack, or exact unique function name.
input	string	required. Input path (see list_module_inputs).
parameter	string	required. Namespaced parameter to read, e.g. User.SpawnCount, Engine.DeltaTime, Emitter.Age. It takes the input's type.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, stack, module, inputs, input, count, compileStatus, message.

niagara.set_live_parameter (risk 2, mutates, requires plugin Niagara, requires PIE, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
property	string	required. Variable name or reflected property.
type	string	UE type name. Default TEXT("float").
value	string	required. Text-import value.

Returns: component, system, active, message.

niagara.set_live_visibility (risk 2, mutates, requires plugin Niagara, requires PIE, smoke)

Shows or hides a Niagara component in the PIE world.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Niagara component name; may be omitted when the actor owns exactly one.
visible	boolean	required. Show (true) or hide (false) the component.
propagateToChildren	boolean	Apply the visibility to attached children too. Default false.

Returns: actor, component, system, world, active, paused, visible, renderingEnabled, tickEnabled, autoActivate, complete, tickBehavior, desiredAge, age, location, particles, emitters, parameters, message.

niagara.set_material_override (risk 2, mutates, requires plugin Niagara, smoke)

Replaces the material of one override slot (index) of a mesh renderer.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Mesh renderer index; empty means the only mesh renderer.
index	integer	Override slot index (set/remove). Default -1.
material	string	Material asset path (add/set).

Returns: renderer, overrideMaterials, overrides, count, message.

niagara.set_mesh_facing (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_mesh_pivot (risk 2, mutates, requires plugin Niagara, smoke)

Sets the pivot offset of every mesh entry of a mesh renderer (FVector text); an empty mesh list gets one default entry.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_mesh_renderer (risk 2, mutates, requires plugin Niagara, smoke)

Writes mesh renderer fields (FacingMode, SortMode, locked axis, frustum/camera culling, flipbook, bOverrideMaterials...); meshes and material overrides have their own tools.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Renderer index from niagara.list_renderers; empty means the only renderer of this kind.
values	array of string	required. Field=Value entries; fields come from niagara.list_renderer_fields for this kind. Object fields take asset paths or None.
addIfMissing	boolean	Add a renderer of this kind to the emitter when it has none. Default false.

Returns: system, emitter, index, kind, class, enabled, fields, changed, message.

niagara.set_mesh_sort (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_module_enabled (risk 2, mutates, requires plugin Niagara, smoke)

Enables or disables a stack module (FNiagaraStackGraphUtilities::SetModuleIsEnabled).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index; empty for systemSpawn/systemUpdate.
usage	string	required. Stack usage, e.g. particleUpdate, emitterUpdate, event:0, stage:0, systemSpawn.
module	string	required. Module node GUID, zero-based index in the stack, or exact unique function name.
enabled	boolean	New enabled state (set_module_enabled). Default true.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, stacks, module, count, compileStatus, message.

niagara.set_module_input (risk 2, mutates, UE 5.2+, requires plugin Niagara, smoke)

Sets a module input to a local value (rapid-iteration constant or static value), replacing links/dynamic inputs. UE 5.2+.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	Emitter handle name or index; empty for systemSpawn/systemUpdate.
usage	string	required. Stack usage, e.g. particleUpdate, emitterUpdate, event:0, stage:0, systemSpawn.
module	string	required. Module node GUID, zero-based index in the stack, or exact unique function name.
input	string	required. Input path (see list_module_inputs).
value	string	required. Local value: float/int as a number, bool as true/false, enum by entry name or number, other types in UE struct text, e.g. (X=0,Y=0,Z=100) or (R=1,G=0.5,B=0,A=1).
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, stack, module, inputs, input, count, compileStatus, message.

niagara.set_paused (risk 2, mutates, requires plugin Niagara, requires PIE, smoke)

No description.

Argument	Type	Description
actor	string	required. Actor label/name.
name	string	Component name.
property	string	required. Variable name or reflected property.
type	string	UE type name. Default TEXT("float").
value	string	required. Text-import value.

Returns: component, system, active, message.

niagara.set_properties (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
property	string	required. Reflected system property name.
value	string	required. UE text-import value.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_renderer_binding (risk 2, mutates, requires plugin Niagara, smoke)

Binds a renderer input (ColorBinding, PositionBinding...) to an attribute such as Particles.Color or User.MyColor, through the engine's binding API.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index.
binding	string	required. Binding property name from niagara.list_renderer_bindings, e.g. ColorBinding.
attribute	string	Attribute to bind (set only), e.g. Particles.Color or User.MyColor.

Returns: renderer, kind, bindings, count, message.

niagara.set_renderer_enabled (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_renderer_material (risk 2, mutates, requires plugin Niagara, smoke)

Sets the Material of a sprite, ribbon or decal renderer; mesh renderers use the material override tools.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
material	string	required. Material asset path.

Returns: message, compileStatus.

niagara.set_renderer_mesh (risk 2, mutates, requires plugin Niagara, smoke)

Edits one mesh entry (index): mesh, scale and/or pivot offset; empty fields keep their value.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Mesh renderer index; empty means the only mesh renderer.
index	integer	Mesh entry index (set/remove). Default -1.
mesh	string	Static mesh asset path (add/set; empty keeps the current mesh on set).
scale	string	Scale as (X=..,Y=..,Z=..); empty keeps the current value.
pivotOffset	string	Pivot offset as (X=..,Y=..,Z=..); empty keeps the current value.

Returns: renderer, meshes, count, message.

niagara.set_renderer_property (risk 2, mutates, requires plugin Niagara, smoke)

Writes any reflected renderer property from Unreal text (advanced; prefer the typed set__renderer tools).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_renderer_sort_order (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_renderer_visibility (risk 2, mutates, requires plugin Niagara, smoke)

Sets the visibility tag value a renderer draws with (RendererVisibility; sprite, mesh, light, component and decal renderers).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index.
visibility	integer	Visibility tag value the renderer draws with (compared with the RendererVisibilityTag attribute). Default 0.

Returns: renderer, kind, visibility, tagBinding, enabled, message.

niagara.set_ribbon_facing (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_ribbon_renderer (risk 2, mutates, requires plugin Niagara, smoke)

Writes ribbon renderer fields (Material, FacingMode, UV0Settings/UV1Settings, Shape, tessellation...).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Renderer index from niagara.list_renderers; empty means the only renderer of this kind.
values	array of string	required. Field=Value entries; fields come from niagara.list_renderer_fields for this kind. Object fields take asset paths or None.
addIfMissing	boolean	Add a renderer of this kind to the emitter when it has none. Default false.

Returns: system, emitter, index, kind, class, enabled, fields, changed, message.

niagara.set_ribbon_tessellation (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_ribbon_uv (risk 2, mutates, requires plugin Niagara, smoke)

Sets the UV0 tiling length of a ribbon renderer (UV0Settings.TilingLength).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_scalability_override (risk 2, mutates, requires plugin Niagara, smoke)

Edits the system scalability override at index (only the given fields change).

Argument	Type	Description
system	string	Niagara system asset path (system overrides) or empty when effectType is given.
effectType	string	Effect type asset path (effect-type tools; empty uses the system's effect type).
index	integer	Entry index for set/remove. Default -1.
qualityLevels	string	Effect quality levels: all, or a comma list of indices or Low, Medium, High, Epic, Cinematic. Empty leaves it.
cullByDistance	string	Cull by distance: true/false (empty leaves it). Setting distance fields turns their override on.
maxDistance	string	Maximum distance in cm (empty leaves it).
cullMaxInstanceCount	string	Cull when the effect type exceeds maxInstances: true/false (empty leaves it).
maxInstances	string	Maximum instances of this effect type (empty leaves it).
cullPerSystemMaxInstanceCount	string	Cull when this system exceeds maxSystemInstances: true/false (empty leaves it).
maxSystemInstances	string	Maximum instances of this system (empty leaves it).

Returns: system, effectType, overrideScalability, entries, emitterEntries, fields, count, message.

niagara.set_simulation_stage (risk 2, mutates, requires plugin Niagara, smoke)

Renames, enables/disables a simulation stage or sets its iteration source and partial-update flag.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
stage	string	Simulation stage index, script usage GUID or exact name. Empty on get_simulation_stage lists every stage.
name	string	Stage name when adding; new name when setting (empty keeps it).
index	integer	Target zero-based index (add: insert position, -1 appends; move: required destination). Default -1.
enabled	string	true/false to enable or disable the stage; empty keeps it.
iterationSource	string	Particles or DataInterface (DirectSet on engines that have it); empty keeps it.
disablePartialParticleUpdate	string	true/false for Disable Partial Particle Update; empty keeps it.
compile	boolean	Request a system compile after the change (default true). Default true.

Returns: system, emitter, stages, stage, count, compileStatus, message.

niagara.set_sprite_alignment (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_sprite_cutout (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_sprite_facing (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_sprite_pivot (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_sprite_renderer (risk 2, mutates, requires plugin Niagara, smoke)

Writes sprite renderer fields (Material, Alignment, FacingMode, SortMode, PivotInUVSpace, SubImageSize, cutout, camera distance culling...).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	Renderer index from niagara.list_renderers; empty means the only renderer of this kind.
values	array of string	required. Field=Value entries; fields come from niagara.list_renderer_fields for this kind. Object fields take asset paths or None.
addIfMissing	boolean	Add a renderer of this kind to the emitter when it has none. Default false.

Returns: system, emitter, index, kind, class, enabled, fields, changed, message.

niagara.set_sprite_sort (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_sprite_sub_uv (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind when the emitter has exactly one renderer of that kind.
property	string	required. Reflected property name, for example SortMode or FacingMode (ignored by the typed wrappers, which name their own field).
value	string	required. UE text-import value.

Returns: message, compileStatus.

niagara.set_system_allow_culling_for_local_players (risk 2, mutates, UE 5.0+, requires plugin Niagara, smoke)

Overrides the effect type's allow-culling-for-local-players flag on this system (UE 5.0+).

Argument	Type	Description
system	string	required. Niagara system asset path.
property	string	required. Reflected system property name.
value	string	required. UE text-import value.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_system_auto_deactivate (risk 2, mutates, UE ≤5.3, requires plugin Niagara, smoke)

Sets whether the system deactivates automatically when all emitters finish (the flag exists up to UE 5.3).

Argument	Type	Description
system	string	required. Niagara system asset path.
property	string	required. Reflected system property name.
value	string	required. UE text-import value.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_system_cull_reaction (risk 2, mutates, requires plugin Niagara, smoke)

Sets the cull reaction (Deactivate, DeactivateImmediate, DeactivateResume, DeactivateImmediateResume) on the system's effect type.

Argument	Type	Description
system	string	required. Niagara system asset path.
property	string	required. Reflected system property name.
value	string	required. UE text-import value.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_system_fixed_bounds_mode (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
property	string	required. Reflected system property name.
value	string	required. UE text-import value.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_system_metadata (risk 2, mutates, requires plugin Niagara, smoke)

Sets asset metadata: description, category (UE 5.0+) and library visibility.

Argument	Type	Description
system	string	required. Niagara system asset path.
description	string	Asset description shown in the asset picker (empty leaves it; "none" clears it).
category	string	Library category (UE 5.0+; empty leaves it; "none" clears it).
libraryVisibility	string	Unexposed, Library or Hidden (UE 5.0+); UE 4.27 accepts Unexposed or Library. Empty leaves it.

Returns: target, fields, count, message, compileStatus.

niagara.set_system_override_scalability (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
property	string	required. Reflected system property name.
value	string	required. UE text-import value.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_system_performance (risk 2, mutates, requires plugin Niagara, smoke)

Sets cook/edit performance switches: rapid-iteration baking, attribute compression and trimming, debug switches.

Argument	Type	Description
system	string	required. Niagara system asset path.
bakeOutRapidIteration	string	true/false bake rapid-iteration parameters while editing (empty leaves it).
bakeOutRapidIterationOnCook	string	true/false bake rapid-iteration parameters on cook (empty leaves it).
compressAttributes	string	true/false compress particle attributes (empty leaves it).
trimAttributes	string	true/false trim unused attributes while editing (empty leaves it).
trimAttributesOnCook	string	true/false trim unused attributes on cook (empty leaves it).
disableDebugSwitches	string	true/false disable debug switches (empty leaves it).

Returns: target, fields, count, message, compileStatus.

niagara.set_system_rendering (risk 2, mutates, UE 5.0+, requires plugin Niagara, smoke)

Sets default rendering overrides of the system (cast shadow, decals, custom depth, stencil; translucency sort on UE 5.1+); "default" clears an override.

Argument	Type	Description
system	string	required. Niagara system asset path.
castShadow	string	true/false overrides component cast shadow; "default" removes the override; empty leaves it.
receivesDecals	string	true/false receives decals; "default" removes the override; empty leaves it.
renderCustomDepth	string	true/false render custom depth; "default" removes the override; empty leaves it.
customDepthStencilValue	string	Custom depth stencil value 0-255; "default" removes the override; empty leaves it.
translucencySortPriority	string	Translucency sort priority (UE 5.1+); "default" removes the override; empty leaves it.
translucencySortDistanceOffset	string	Translucency sort distance offset (UE 5.1+); "default" removes the override; empty leaves it.

Returns: target, fields, count, message, compileStatus.

niagara.set_system_scalability_override (risk 2, mutates, requires plugin Niagara, smoke)

Replaces the system scalability overrides (FNiagaraSystemScalabilityOverrides text, e.g. (Overrides=())).

Argument	Type	Description
system	string	required. Niagara system asset path.
property	string	required. Reflected system property name.
value	string	required. UE text-import value.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_system_significance_handler (risk 2, mutates, requires plugin Niagara, smoke)

Sets the significance handler of the system's effect type: Distance, Age, a handler class path, or None.

Argument	Type	Description
system	string	required. Niagara system asset path.
property	string	required. Reflected system property name.
value	string	required. UE text-import value.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_system_simulation (risk 2, mutates, requires plugin Niagara, smoke)

Sets the simulation settings group; UE 5.0-only fields are rejected with E_NOT_SUPPORTED on 4.27. Requests a compile.

Argument	Type	Description
system	string	required. Niagara system asset path.
warmupTime	string	Warmup seconds (empty leaves it).
warmupTickCount	string	Warmup tick count (empty leaves it).
warmupTickDelta	string	Warmup tick delta in seconds (empty leaves it).
determinism	string	true/false deterministic simulation (UE 5.0+; empty leaves it).
randomSeed	string	Random seed used when deterministic (UE 5.0+; empty leaves it).
fixedTickDelta	string	true/false fixed tick delta (UE 5.0+; empty leaves it).
fixedTickDeltaTime	string	Fixed tick delta seconds (UE 5.0+; empty leaves it).

Returns: target, fields, count, message, compileStatus.

niagara.set_system_thumbnail_age (risk 2, mutates, UE ≤5.0, requires plugin Niagara, smoke)

Marks the system thumbnail as out of date (the flag exists up to UE 5.0).

Argument	Type	Description
system	string	required. Niagara system asset path.
property	string	required. Reflected system property name.
value	string	required. UE text-import value.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_system_trim_attributes (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
property	string	required. Reflected system property name.
value	string	required. UE text-import value.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_system_warmup_tick_count (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
property	string	required. Reflected system property name.
value	string	required. UE text-import value.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_system_warmup_tick_delta (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
property	string	required. Reflected system property name.
value	string	required. UE text-import value.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.set_user_parameter (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without User. prefix.
newName	string	New name for rename operations.
type	string	UE type name: float, int, bool, vec2, vec3, vec4, quat, color. Default TEXT("float").
value	string	Text-import default value.

Returns: parameters, count, message.

niagara.set_user_parameter_bool (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without User. prefix.
newName	string	New name for rename operations.
type	string	UE type name: float, int, bool, vec2, vec3, vec4, quat, color. Default TEXT("float").
value	string	Text-import default value.

Returns: parameters, count, message.

niagara.set_user_parameter_color (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without User. prefix.
newName	string	New name for rename operations.
type	string	UE type name: float, int, bool, vec2, vec3, vec4, quat, color. Default TEXT("float").
value	string	Text-import default value.

Returns: parameters, count, message.

niagara.set_user_parameter_data_interface (risk 2, mutates, requires plugin Niagara, smoke)

Writes editable fields of a data interface user parameter (Field=Value entries; object fields take asset paths).

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. Data interface user parameter name.
values	array of string	required. Field=Value entries; fields must be editable properties of the data interface class (see niagara.get_user_parameter_data_interface). Object fields take asset paths.

Returns: owner, parameter, fields, message.

niagara.set_user_parameter_float (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without User. prefix.
newName	string	New name for rename operations.
type	string	UE type name: float, int, bool, vec2, vec3, vec4, quat, color. Default TEXT("float").
value	string	Text-import default value.

Returns: parameters, count, message.

niagara.set_user_parameter_int (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without User. prefix.
newName	string	New name for rename operations.
type	string	UE type name: float, int, bool, vec2, vec3, vec4, quat, color. Default TEXT("float").
value	string	Text-import default value.

Returns: parameters, count, message.

niagara.set_user_parameter_material (risk 2, mutates, requires plugin Niagara, smoke)

Sets a material user parameter (UMaterialInterface asset; None clears it).

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.
asset	string	required. Asset path or unique asset name; None clears the value.
addIfMissing	boolean	Create the user parameter with the tool's object type when it does not exist yet. Default false.

Returns: owner, parameter, fields, message.

niagara.set_user_parameter_matrix (risk 2, mutates, requires plugin Niagara, smoke)

Sets a 4x4 matrix user parameter from sixteen floats (row-major).

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.
values	array of number	required. Sixteen floats in row-major order (M[0][0], M[0][1] ... M[3][3]).
addIfMissing	boolean	Create the user parameter as a matrix when it does not exist yet. Default false.

Returns: owner, parameter, fields, message.

niagara.set_user_parameter_object (risk 2, mutates, requires plugin Niagara, smoke)

Sets a generic UObject user parameter to any asset (None clears it).

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.
asset	string	required. Asset path or unique asset name; None clears the value.
addIfMissing	boolean	Create the user parameter with the tool's object type when it does not exist yet. Default false.

Returns: owner, parameter, fields, message.

niagara.set_user_parameter_position (risk 2, mutates, UE 5.0+, requires plugin Niagara, smoke)

Sets a position user parameter (large-world position type, UE 5.0+); value is (X=..,Y=..,Z=..).

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.
value	string	required. Unreal text value, e.g. (X=1,Y=2) for vec2, (X=1,Y=2,Z=3) for position, (X=0,Y=0,Z=0,W=1) for quat.
addIfMissing	boolean	Create the user parameter with this type when it does not exist yet. Default false.

Returns: owner, parameter, fields, message.

niagara.set_user_parameter_quat (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without User. prefix.
newName	string	New name for rename operations.
type	string	UE type name: float, int, bool, vec2, vec3, vec4, quat, color. Default TEXT("float").
value	string	Text-import default value.

Returns: parameters, count, message.

niagara.set_user_parameter_render_target (risk 2, mutates, requires plugin Niagara, smoke)

Sets a texture render target user parameter (UTextureRenderTarget asset; None clears it).

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.
asset	string	required. Asset path or unique asset name; None clears the value.
addIfMissing	boolean	Create the user parameter with the tool's object type when it does not exist yet. Default false.

Returns: owner, parameter, fields, message.

niagara.set_user_parameter_static_mesh (risk 2, mutates, UE 5.0+, requires plugin Niagara, smoke)

Sets a static mesh user parameter (UE 5.0+; None clears it).

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.
asset	string	required. Asset path or unique asset name; None clears the value.
addIfMissing	boolean	Create the user parameter with the tool's object type when it does not exist yet. Default false.

Returns: owner, parameter, fields, message.

niagara.set_user_parameter_texture (risk 2, mutates, requires plugin Niagara, smoke)

Sets a texture user parameter (UTexture asset; None clears it).

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without the User. prefix.
asset	string	required. Asset path or unique asset name; None clears the value.
addIfMissing	boolean	Create the user parameter with the tool's object type when it does not exist yet. Default false.

Returns: owner, parameter, fields, message.

niagara.set_user_parameter_vec2 (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without User. prefix.
newName	string	New name for rename operations.
type	string	UE type name: float, int, bool, vec2, vec3, vec4, quat, color. Default TEXT("float").
value	string	Text-import default value.

Returns: parameters, count, message.

niagara.set_user_parameter_vec3 (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without User. prefix.
newName	string	New name for rename operations.
type	string	UE type name: float, int, bool, vec2, vec3, vec4, quat, color. Default TEXT("float").
value	string	Text-import default value.

Returns: parameters, count, message.

niagara.set_user_parameter_vec4 (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
name	string	required. User parameter name, with or without User. prefix.
newName	string	New name for rename operations.
type	string	UE type name: float, int, bool, vec2, vec3, vec4, quat, color. Default TEXT("float").
value	string	Text-import default value.

Returns: parameters, count, message.

niagara.set_warmup (risk 2, mutates, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
seconds	number	required. Warmup seconds.

Returns: asset, emitterCount, compileStatus, message, handles.

niagara.spawn_actor (risk 2, mutates, requires plugin Niagara, requires world, smoke)

Places a Niagara actor in the editor level with the given system, label and location.

Argument	Type	Description
system	string	required. Niagara system asset path.
actor	string	Optional actor label for the spawned test actor.
location	{x,y,z}	Spawn location.
name	string	Component name.

Returns: component, system, active, message.

niagara.spawn_at_location (risk 2, mutates, requires plugin Niagara, requires PIE, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
actor	string	Optional actor label for the spawned test actor.
location	{x,y,z}	Spawn location.
name	string	Component name.

Returns: component, system, active, message.

niagara.spawn_attached (risk 2, mutates, requires plugin Niagara, requires PIE, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.
actor	string	required. Existing actor label/name to attach to.
component	string	Optional component name on the actor.
location	{x,y,z}	Relative location.

Returns: component, system, active, message.

niagara.spawn_test_actor (risk 2, mutates, requires plugin Niagara, requires PIE, requires world, smoke)

Spawns a PIE test actor whose root is a Niagara component (named NiagaraSmokeComponent) playing the system.

Argument	Type	Description
system	string	required. Niagara system asset path.
actor	string	Optional actor label for the spawned test actor.
location	{x,y,z}	Spawn location.
name	string	Component name.

Returns: component, system, active, message.

niagara.sync_emitter_with_parent (risk 2, mutates, requires plugin Niagara, smoke)

Pulls the parent's changes into the emitter (merge) when it is not synchronized.

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Handle name, index or handle id GUID.

Returns: handle, hasParent, parent, parentVersion, parentAtLastMerge, synchronized, parentVersions, message, compileStatus.

niagara.validate (risk 0, requires plugin Niagara, smoke)

No description.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: valid, ready, compileStatus, errors, message, issues, warningCount.

niagara.validate_renderer_bindings (risk 0, requires plugin Niagara, smoke)

Checks a renderer's bindings: every non-particle binding must read a variable the emitter provides (state of the last compile).

Argument	Type	Description
system	string	required. Niagara system asset path.
emitter	string	required. Emitter handle name or index.
renderer	string	required. Renderer index, or a kind (sprite, mesh, ribbon, light, component, decal) when the emitter has exactly one renderer of that kind.

Returns: valid, checked, issues, message.

niagara.validate_renderers (risk 0, requires plugin Niagara, smoke)

Validates every enabled renderer of a system against its kind's schema: sim-target support, material, meshes, component type, overrides and bindings.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: valid, checked, issues, message.

niagara.wait_compile (risk 0, requires plugin Niagara, smoke)

Blocks until the system's pending compilation (VM scripts, not GPU shaders) has finished, using Niagara's own wait, and returns the final status.

Argument	Type	Description
system	string	required. Niagara system asset path.

Returns: asset, emitterCount, compileStatus, message, handles.