`material` kit

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

Guide

Everything needed to author materials from an agent: create the asset, build the expression graph, expose parameters, derive instances, package logic into material functions, stack material layers (UE 5) and generate complete materials from a single call with the recipes.

Class map

Class	What it covers
`UUeaKit_Material`	the Material asset: creation, domain/blend/shading settings, usage flags, compile + statistics, textures, hierarchy, validation, expression-class discovery, graph JSON export
`UUeaKit_MaterialGraph`	the expression graph: list/find/move/delete nodes, connections, comments, every typed `material.add_*` factory, `material.build_graph`, parameter declarations
`UUeaKit_MaterialInstance`	Material Instance Constants: parameter overrides, base-property overrides, hierarchy, batch edits
`UUeaKit_MaterialFunction`	Material Functions: inputs/outputs, the exposed library, function instances, extraction and inlining
`UUeaKit_MaterialLayers`	material layers and layer blends (UE 5.0+, hidden on 4.27)
`UUeaKit_MaterialRecipes`	one-call builders: PBR, emissive, masked, glass, decal, UI, post-process, water, landscape, checker, ...

All six share the kit name material, so edit.enable_kits {"kits":["material"]} exposes the lot.

Start here

material.list_recipes — see what can be built in one call.
material.recipe_pbr {"folder":"/Game/Materials","name":"M_Rock","baseColor":"/Game/Tex/T_Rock_BC","normal":"/Game/Tex/T_Rock_N","roughness":"/Game/Tex/T_Rock_R","parameterize":true} creates a compiled, parameterised material and returns the node map.
material.create_instance {"parent":"/Game/Materials/M_Rock","folder":"/Game/Materials","name":"MI_RockMossy","scalars":[{"name":"Roughness","value":0.8}]}.
Need something custom? material.get_graph to see the current state, then material.build_graph to author nodes and links declaratively, then material.compile.

Recipe workflow (fastest path)

Every recipe accepts either folder + name (creates the asset) or material (fills an existing one, clearing its graph first). parameterize: true (default) turns the inputs into material parameters in the group given by group, so one base material plus instances covers all variants.

material.recipe_checker    {"folder":"/Game/Dev","name":"M_Checker","scale":16}
material.recipe_emissive   {"folder":"/Game/FX","name":"M_Glow","color":{"r":0,"g":0.7,"b":1},"intensity":8,"pulse":2}
material.recipe_masked     {"folder":"/Game/Foliage","name":"M_Leaf","texture":"/Game/Tex/T_Leaf","foliage":true}
material.recipe_from_texture_folder {"textureFolder":"/Game/Tex/Rock","folder":"/Game/Materials","name":"M_Rock","dryRun":true}

The reply's nodes maps a role (baseColor, normal, roughness, emissive, ...) to the expression object name, so follow-up edits can address the nodes directly.

Graph workflow

Identify a node by its object name (MaterialExpressionMultiply_3), its description (set it with desc when creating, or material.set_node_desc), a #index, or a parameter name. Descriptions are the most readable and survive renames.
material.build_graph is the batch form: nodes[] with a local id and a kind (Multiply, TextureSample, ScalarParameter, ... — the class name without the MaterialExpression prefix), links[] with from/output/to/input. to may be a node id or a material property name (BaseColor, Roughness, EmissiveColor, OpacityMask, Normal, WorldPositionOffset, AmbientOcclusion, Refraction, PixelDepthOffset, CustomizedUV0..7, SubsurfaceColor, ...).
material.connect {"target":..., "node":"Mul", "to":"BaseColor"} for a property, "to":"OtherNode.A" for an expression input. material.connect_many batches them.
material.add_node is the escape hatch for any class the typed factories do not cover; use material.list_expression_classes / material.get_expression_class_info to discover names, pins and editable properties first.
material.arrange_nodes tidies the layout, material.add_comment_around documents a cluster.

Compiling

Node tools do not recompile (compile defaults to false): shader compilation is the slow part. Batch the edits and call material.compile once. material.get_stats reads the current statistics without recompiling; material.get_compile_errors reports the per-expression errors of the last compile. On UE 4.27 RecompileMaterial returns nothing, so errors comes back empty there even when the material fails — check material.validate as well.

Instances

material.get_instance returns every parameter with its value, the parent value and an overridden flag: the one call an agent needs before changing anything.
material.set_scalar / set_vector / set_texture / set_static_switch fail with E_NOT_FOUND when the name is not a parameter of the parent, which is the usual typo signal.
material.set_instance_overrides handles blend mode, shading model, two-sided, dithered LOD, opacity mask clip value and shadow flags. Pass "inherit" to drop an override.
Bulk work: material.create_instance_variants, material.batch_set_scalar, material.batch_set_texture, material.batch_reparent, material.copy_parameters.

Functions and the library

material.create_function declares inputs and outputs in one call; the function's graph is then edited with the same node tools by passing the function asset as target. material.add_function_input and material.add_function_output add more declarations. material.list_function_library and material.list_engine_functions are the palette an agent can call from material.add_function_call. material.function_from_nodes extracts a selection of a material's expressions into a new function (and replaces them with a call); material.inline_function_call does the reverse.

Layers (UE 5.0+)

material.create_layer / material.create_layer_blend make the assets, material.add_material_attribute_layers_node puts the stack host into a material, then material.set_layers / add_layer / remove_layer / reorder_layer / set_layer_visible edit the stack. Layer index 0 is the background layer and has no blend. On UE 4.27 these tools are not advertised at all.

Gotchas

Compile cost. Keep compile: false on node tools; one material.compile at the end.
Sampler types. material.add_texture_sample with samplerType: "auto" derives the type from the texture. A normal map sampled as color compiles but looks wrong — material.get_texture_samplers lists the mismatches.
Parameter names are unique per material. Two declarations with the same name are a compile error; material.validate reports them as duplicate_parameter.
4.27 vs 5.1+ input storage is transparent. The kit hides UMaterialEditorOnlyData, so "to":"BaseColor" works identically on both engines. Property names that only exist on one engine (RefractionMethod, outputTranslucentVelocity, Substrate) return E_NOT_SUPPORTED.
Named reroutes need UE 5.0. On 4.27 use material.add_reroute.
Math ops differ per engine. material.add_math accepts length, exp, log, modulo only from UE 5.x; on 4.27 the call returns E_NOT_SUPPORTED with the list of known operations.
material.clear_graph and material.delete_nodes are destructive and break every link that touched the removed expressions. Export first with material.export_graph if in doubt.
Names with spaces work for expression inputs ("to":"Blend.Layer Grass"); quote them in JSON as usual.

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.

`material.add_actor_position` (risk 2, mutates, smoke)

Adds an Actor Position (world space) node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_blackbody` (risk 2, mutates, smoke)

Adds a Blackbody node (colour of a temperature in kelvin).

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_bump_offset` (risk 2, mutates, smoke)

Adds a Bump Offset (parallax) node.

Argument	Type	Description
`heightRatio`	number	Default `0.05`.
`referencePlane`	number	Default `0.5`.

Returns: node, target, errors.

`material.add_camera_position` (risk 2, mutates, smoke)

Adds a Camera Position (world space) node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_camera_vector` (risk 2, mutates, smoke)

Adds a Camera Vector node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_collection_parameter` (risk 2, mutates)

Adds a Material Parameter Collection parameter node. SmokeSkip: it needs a Material Parameter Collection asset, which the sandbox does not provide.

Argument	Type	Description
`collection`	string	required. Material Parameter Collection asset.
`name`	string	required. Parameter name inside the collection.

Returns: node, target, errors.

`material.add_comment` (risk 2, mutates, smoke)

Adds a comment box to a graph.

Argument	Type	Description
`target`	string	required.
`text`	string	required.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`width`	integer	Default `400`.
`height`	integer	Default `200`.
`color`	UeaMatColor

Returns: comment.

`material.add_comment_around` (risk 2, mutates, smoke)

Adds a comment box sized to enclose the given expressions.

Argument	Type	Description
`target`	string	required.
`text`	string	required.
`nodes`	array of string	required. Expressions to enclose.
`padding`	integer	Extra margin in graph units (default 40). Default `40`.
`color`	UeaMatColor

Returns: comment.

`material.add_component_mask` (risk 2, mutates, smoke)

Adds a Component Mask node.

Argument	Type	Description
`r`	boolean	Default `true`.
`g`	boolean	Default `false`.
`b`	boolean	Default `false`.
`a`	boolean	Default `false`.

Returns: node, target, errors.

`material.add_constant` (risk 2, mutates, smoke)

Adds a scalar constant.

Argument	Type	Description
`value`	number	Default `0.0`.

Returns: node, target, errors.

`material.add_constant2` (risk 2, mutates, smoke)

Adds a two-component constant.

Argument	Type	Description
`r`	number	Default `0.0`.
`g`	number	Default `0.0`.

Returns: node, target, errors.

`material.add_constant3` (risk 2, mutates, smoke)

Adds a three-component (colour) constant.

Argument	Type	Description
`color`	UeaMatColor

Returns: node, target, errors.

`material.add_constant4` (risk 2, mutates, smoke)

Adds a four-component constant.

Argument	Type	Description
`color`	UeaMatColor

Returns: node, target, errors.

`material.add_curve_atlas_row_parameter` (risk 2, mutates, smoke)

Adds a Curve Atlas Row Parameter node (the atlas and curve assets are optional).

Argument	Type	Description
`name`	string	required.
`atlas`	string	Curve Atlas asset.
`curve`	string	Curve Linear Color asset inside the atlas.
`group`	string

Returns: node, target, errors.

`material.add_custom` (risk 2, mutates, smoke)

Adds a Custom HLSL node with named inputs and an output type.

Argument	Type	Description
`code`	string	required. HLSL body; it must return a value of the declared output type.
`outputType`	string	float (default) / float2 / float3 / float4 / material_attributes.
`inputs`	array of string	Input names.
`description`	string	Caption of the node.
`additionalOutputs`	array of UeaMatCustomOutput	Extra named outputs.
`includes`	array of string	.ush files to include (5.x).
`defines`	array of UeaKeyValue	Preprocessor defines as name=value pairs (5.x).

Returns: node, target, errors.

`material.add_ddx` (risk 2, mutates, smoke)

Adds a DDX node (screen-space horizontal derivative).

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_ddy` (risk 2, mutates, smoke)

Adds a DDY node (screen-space vertical derivative).

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_depth_fade` (risk 2, mutates, smoke)

Adds a Depth Fade node.

Argument	Type	Description
`fadeDistance`	number	Default `100.0`.
`opacity`	number	Default `1.0`.

Returns: node, target, errors.

`material.add_depth_of_field_function` (risk 2, mutates, smoke)

Adds a Depth Of Field Function node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_desaturation` (risk 2, mutates, smoke)

Adds a Desaturation node with luminance weights.

Argument	Type	Description
`luminanceFactors`	UeaMatColor	Luminance weights (default 0.3/0.59/0.11).

Returns: node, target, errors.

`material.add_distance_to_nearest_surface` (risk 2, mutates, smoke)

Adds a Distance To Nearest Surface node (needs distance fields).

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_dynamic_parameter` (risk 2, mutates, smoke)

Adds a Dynamic Parameter node (four named channels driven by the particle system).

Argument	Type	Description
`names`	array of string	Names of the four parameter channels.
`index`	integer	Default `0`.

Returns: node, target, errors.

`material.add_eye_adaptation` (risk 2, mutates, smoke)

Adds an Eye Adaptation node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_feature_level_switch` (risk 2, mutates, smoke)

Adds a Feature Level Switch node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_fresnel` (risk 2, mutates, smoke)

Adds a Fresnel node.

Argument	Type	Description
`exponent`	number	Default `5.0`.
`baseReflectFraction`	number	Default `0.04`.

Returns: node, target, errors.

`material.add_function_call` (risk 2, mutates, smoke)

Adds a Material Function Call node bound to a function asset.

Argument	Type	Description
`function`	string	required. Material Function asset, e.g. "/Engine/Functions/Engine_MaterialFunctions02/Utility/BlendAngleCorrectedNormals".

Returns: node, target, errors.

`material.add_function_input` (risk 2, mutates, smoke)

Adds a Function Input node (material functions only).

Argument	Type	Description
`name`	string	required.
`type`	string	scalar / vector2 / vector3 / vector4 / texture2d / texture_cube / texture2d_array / volume_texture / static_bool / material_attributes / bool.
`previewValue`	UeaMatColor	Preview value used while editing the function.
`sortPriority`	integer	Default `32`.
`usePreviewValueAsDefault`	boolean	Make the preview value the default when the input is left unconnected. Default `false`.
`description`	string

Returns: node, target, errors.

`material.add_function_output` (risk 2, mutates, smoke)

Adds a Function Output node (material functions only).

Argument	Type	Description
`name`	string	required.
`sortPriority`	integer	Default `32`.
`description`	string

Returns: node, target, errors.

`material.add_function_to_library` (risk 2, mutates, smoke)

Exposes a function in the material palette under the given categories (shortcut for set_function_settings).

Argument	Type	Description
`function`	string	required.
`description`	string
`exposeToLibrary`	string	"true" / "false"; empty keeps the current state.
`categories`	array of string

Returns: asset, description, exposeToLibrary, libraryCategories, inputs, outputs, nodeCount, users.

`material.add_if` (risk 2, mutates, smoke)

Adds an If node (branch on a comparison).

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_landscape_coords` (risk 2, mutates, smoke)

Adds a Landscape Layer Coords node (world-aligned landscape UVs).

Argument	Type	Description
`mappingScale`	number	Default `1.0`.
`mappingType`	string	auto / xy / xz / yz.

Returns: node, target, errors.

`material.add_landscape_layer_blend` (risk 2, mutates, smoke)

Adds a Landscape Layer Blend node with its layer list.

Argument	Type	Description
`layers`	array of UeaMatLandscapeLayer	required.

Returns: node, target, errors.

`material.add_landscape_layer_sample` (risk 2, mutates, smoke)

Adds a Landscape Layer Sample node.

Argument	Type	Description
`layerName`	string	required.
`previewWeight`	number	Default `1.0`.
`previewUsed`	boolean	Preview the "used" branch of a layer switch (default true). Default `true`.

Returns: node, target, errors.

`material.add_landscape_layer_switch` (risk 2, mutates, smoke)

Adds a Landscape Layer Switch node.

Argument	Type	Description
`layerName`	string	required.
`previewWeight`	number	Default `1.0`.
`previewUsed`	boolean	Preview the "used" branch of a layer switch (default true). Default `true`.

Returns: node, target, errors.

`material.add_landscape_layer_weight` (risk 2, mutates, smoke)

Adds a Landscape Layer Weight node.

Argument	Type	Description
`layerName`	string	required.
`previewWeight`	number	Default `1.0`.
`previewUsed`	boolean	Preview the "used" branch of a layer switch (default true). Default `true`.

Returns: node, target, errors.

`material.add_layer` (risk 2, mutates, UE 5.0+, smoke)

Appends one layer (and its blend) to the stack of a material.

Argument	Type	Description
`target`	string	required.
`layer`	string	Material layer function asset.
`blend`	string	Blend function asset.
`name`	string	Display name.

Returns: layers, total, node.

`material.add_material_attribute_layers_node` (risk 2, mutates, UE 5.0+, smoke)

Adds a Material Attribute Layers expression to a material (the node that hosts the layer stack).

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_material_attributes_node` (risk 2, mutates, smoke)

Adds a Make / Break / Set / Get Material Attributes node.

Argument	Type	Description
`kind`	string	required. make / break / set / get.
`attributes`	array of string	Attribute names for the set/get variants ("BaseColor", "Roughness", ...).

Returns: node, target, errors.

`material.add_math` (risk 2, mutates, smoke)

Adds a math expression by operation name (multiply, lerp, clamp, dot, append, ...).

Argument	Type	Description
`op`	string	required. add, subtract, multiply, divide, lerp, power, clamp, one_minus, saturate, abs, sine, cosine, frac, floor, ceil, round, truncate, step, smoothstep, min, max, dot, cross, normalize, append, sqrt, distance, fmod, sign, arctangent, arctangent2, desaturation, if (5.x also exposes length, exp, log, log2, log10).
`constA`	number	Constant fallback of the A input, when the expression has one. Default `0.0`.
`constB`	number	Constant fallback of the B input, when the expression has one. Default `1.0`.

Returns: node, target, errors.

`material.add_named_reroute` (risk 2, mutates, UE 5.0+, smoke)

Adds a named reroute declaration; usages reference it by name.

Argument	Type	Description
`name`	string	required. Name of the reroute variable.

Returns: node, target, errors.

`material.add_named_reroute_usage` (risk 2, mutates, UE 5.0+, smoke)

Adds a usage of an existing named reroute declaration.

Argument	Type	Description
`name`	string	required. Name of the reroute variable.

Returns: node, target, errors.

`material.add_node` (risk 2, mutates, smoke)

Adds any material expression class by name, optionally setting properties on it. The escape hatch for anything the typed factories do not cover.

Argument	Type	Description
`class`	string	required. Expression class or short alias ("Multiply", "TextureSample", "MaterialExpressionFresnel").
`properties`	array of UeaKeyValue	Properties to set on the new expression.

Returns: node, target, errors.

`material.add_noise` (risk 2, mutates, smoke)

Adds a Noise node (procedural noise).

Argument	Type	Description
`scale`	number	Default `1.0`.
`quality`	integer	Default `1`.
`function`	string	simplex / gradient / fast_gradient / value / voronoi.
`levels`	integer	Default `6`.
`turbulence`	boolean	Default `true`.

Returns: node, target, errors.

`material.add_object_orientation` (risk 2, mutates, smoke)

Adds an Object Orientation node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_object_position` (risk 2, mutates, smoke)

Adds an Object Position (world space) node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_object_scale` (risk 2, mutates, smoke)

Adds an Object Bounds node: the world-space bounds of the object, which is how a material reads an object's scale (there is no dedicated ObjectScale expression; that one is a material function).

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_panner` (risk 2, mutates, smoke)

Adds a Panner node (scrolls UVs over time).

Argument	Type	Description
`speedX`	number	Default `0.0`.
`speedY`	number	Default `0.0`.

Returns: node, target, errors.

`material.add_particle_color` (risk 2, mutates, smoke)

Adds a Particle Color node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_particle_macro_uv` (risk 2, mutates, smoke)

Adds a Particle Macro UV node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_particle_position_ws` (risk 2, mutates, smoke)

Adds a Particle Position (world space) node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_particle_radius` (risk 2, mutates, smoke)

Adds a Particle Radius node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_particle_subuv` (risk 2, mutates, smoke)

Adds a Particle SubUV node (sprite sheet sampling).

Argument	Type	Description
`texture`	string
`blend`	boolean	Default `true`.

Returns: node, target, errors.

`material.add_per_instance_custom_data` (risk 2, mutates, smoke)

Adds a Per Instance Custom Data node reading one float slot.

Argument	Type	Description
`index`	integer	Index or slot (per-instance custom data index, light index, dynamic-parameter index). Default `0`.

Returns: node, target, errors.

`material.add_per_instance_fade_amount` (risk 2, mutates, smoke)

Adds a Per Instance Fade Amount node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_per_instance_random` (risk 2, mutates, smoke)

Adds a Per Instance Random node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_pixel_depth` (risk 2, mutates, smoke)

Adds a Pixel Depth node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_pixel_normal_ws` (risk 2, mutates, smoke)

Adds a Pixel Normal (world space) node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_previous_frame_switch` (risk 2, mutates, smoke)

Adds a Previous Frame Switch node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_quality_switch` (risk 2, mutates, smoke)

Adds a Quality Switch node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_ray_tracing_quality_switch` (risk 2, mutates, smoke)

Adds a Ray Tracing Quality Switch node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_reflection_vector` (risk 2, mutates, smoke)

Adds a Reflection Vector (world space) node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_reroute` (risk 2, mutates, smoke)

Adds a reroute node (a pass-through used to tidy long wires).

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_rotator` (risk 2, mutates, smoke)

Adds a Rotator node (rotates UVs over time).

Argument	Type	Description
`centerX`	number	Default `0.5`.
`centerY`	number	Default `0.5`.
`speed`	number	Default `0.25`.

Returns: node, target, errors.

`material.add_runtime_virtual_texture_sample` (risk 2, mutates, smoke)

Adds a Runtime Virtual Texture Sample node.

Argument	Type	Description
`virtualTexture`	string	Runtime Virtual Texture asset (optional).
`materialType`	string	base_color / base_color_normal_roughness / base_color_normal_specular / world_height / ...

Returns: node, target, errors.

`material.add_scalar_parameter` (risk 2, mutates, smoke)

Adds a scalar parameter with a group, default and slider range.

Argument	Type	Description
`name`	string	required.
`defaultValue`	number	Default `0.0`.
`group`	string
`min`	number	Default `0.0`.
`max`	number	Default `1.0`.
`sortPriority`	integer	Default `32`.

Returns: node, target, errors.

`material.add_scene_color` (risk 2, mutates, smoke)

Adds a Scene Color node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_scene_depth` (risk 2, mutates, smoke)

Adds a Scene Depth node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_scene_texture` (risk 2, mutates, smoke)

Adds a Scene Texture node (post-process domain).

Argument	Type	Description
`id`	string	Scene texture id, e.g. "PostProcessInput0", "SceneColor", "SceneDepth", "WorldNormal".
`filtered`	boolean	Default `false`.

Returns: node, target, errors.

`material.add_screen_position` (risk 2, mutates, smoke)

Adds a Screen Position node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_shading_path_switch` (risk 2, mutates, smoke)

Adds a Shading Path Switch node (deferred / forward / mobile).

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_sky_atmosphere_light_direction` (risk 2, mutates, smoke)

Adds a Sky Atmosphere Light Direction node.

Argument	Type	Description
`index`	integer	Index or slot (per-instance custom data index, light index, dynamic-parameter index). Default `0`.

Returns: node, target, errors.

`material.add_sphere_mask` (risk 2, mutates, smoke)

Adds a Sphere Mask node.

Argument	Type	Description
`attenuationRadius`	number	Default `256.0`.
`hardnessPercent`	number	Default `100.0`.

Returns: node, target, errors.

`material.add_static_bool` (risk 2, mutates, smoke)

Adds a static bool constant.

Argument	Type	Description
`defaultValue`	boolean	Default `true`.

Returns: node, target, errors.

`material.add_static_switch` (risk 2, mutates, smoke)

Adds a static switch (compile-time branch driven by a static bool).

Argument	Type	Description
`defaultValue`	boolean	Default `true`.

Returns: node, target, errors.

`material.add_static_switch_parameter` (risk 2, mutates, smoke)

Adds a static switch parameter (compile-time branch exposed to instances).

Argument	Type	Description
`name`	string	required.
`defaultValue`	boolean	Default `true`.
`group`	string

Returns: node, target, errors.

`material.add_texture_coordinate` (risk 2, mutates, smoke)

Adds a Texture Coordinate node with a UV channel and tiling.

Argument	Type	Description
`index`	integer	UV channel (default 0). Default `0`.
`uTiling`	number	Default `1.0`.
`vTiling`	number	Default `1.0`.

Returns: node, target, errors.

`material.add_texture_object` (risk 2, mutates, smoke)

Adds a Texture Object node (a texture reference passed into a material function).

Argument	Type	Description
`texture`	string	Texture asset, e.g. "/Engine/EngineResources/DefaultTexture".
`samplerType`	string	auto (from the texture) / color / linear_color / normal / masks / alpha / grayscale / linear_grayscale / distance_field / virtual_color / virtual_normal / virtual_masks.
`mipValueMode`	string	none / mip_level / mip_bias / derivative.
`uvNode`	string	Expression to plug into the Coordinates input.

Returns: node, target, errors.

`material.add_texture_object_parameter` (risk 2, mutates, smoke)

Adds a Texture Object Parameter node.

Argument	Type	Description
`name`	string	required.
`group`	string

Returns: node, target, errors.

`material.add_texture_parameter` (risk 2, mutates, smoke)

Adds a Texture Sample Parameter (a texture slot instances can override).

Argument	Type	Description
`name`	string	required.
`group`	string

Returns: node, target, errors.

`material.add_texture_property` (risk 2, mutates, smoke)

Adds a Texture Property node (texture size or texel size).

Argument	Type	Description
`texture`	string	Texture asset to read the property from.
`property`	string	texture_size (default) or texel_size.

Returns: node, target, errors.

`material.add_texture_sample` (risk 2, mutates, smoke)

Adds a Texture Sample node with a texture, sampler type and optional UV source.

Argument	Type	Description
`texture`	string	Texture asset, e.g. "/Engine/EngineResources/DefaultTexture".
`samplerType`	string	auto (from the texture) / color / linear_color / normal / masks / alpha / grayscale / linear_grayscale / distance_field / virtual_color / virtual_normal / virtual_masks.
`mipValueMode`	string	none / mip_level / mip_bias / derivative.
`uvNode`	string	Expression to plug into the Coordinates input.

Returns: node, target, errors.

`material.add_time` (risk 2, mutates, smoke)

Adds a Time node.

Argument	Type	Description
`ignorePause`	boolean	Default `false`.
`period`	number	Period to wrap the time value with (0 = no wrapping). Default `0.0`.

Returns: node, target, errors.

`material.add_transform` (risk 2, mutates, smoke)

Adds a Transform node (converts a vector between tangent/local/world/view spaces).

Argument	Type	Description
`source`	string	tangent / local / world / view / camera / particle (position nodes: local / world / translated_world / view / camera / particle).
`destination`	string	Destination space, same vocabulary as "source".

Returns: node, target, errors.

`material.add_transform_position` (risk 2, mutates, smoke)

Adds a Transform Position node.

Argument	Type	Description
`source`	string	tangent / local / world / view / camera / particle (position nodes: local / world / translated_world / view / camera / particle).
`destination`	string	Destination space, same vocabulary as "source".

Returns: node, target, errors.

`material.add_two_sided_sign` (risk 2, mutates, smoke)

Adds a Two Sided Sign node (+1 on the front face, -1 on the back face).

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_vector_noise` (risk 2, mutates, smoke)

Adds a Vector Noise node.

Argument	Type	Description
`function`	string	cellnoise / perlin_3d / perlin_gradient / perlin_curl / voronoi.

Returns: node, target, errors.

`material.add_vector_parameter` (risk 2, mutates, smoke)

Adds a vector (colour) parameter.

Argument	Type	Description
`name`	string	required.
`color`	UeaMatColor
`group`	string
`sortPriority`	integer	Default `32`.

Returns: node, target, errors.

`material.add_vertex_color` (risk 2, mutates, smoke)

Adds a Vertex Color node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_vertex_interpolator` (risk 2, mutates, smoke)

Adds a Vertex Interpolator node (moves a computation to the vertex shader).

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_vertex_normal_ws` (risk 2, mutates, smoke)

Adds a Vertex Normal (world space) node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_vertex_tangent_ws` (risk 2, mutates, smoke)

Adds a Vertex Tangent (world space) node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_view_size` (risk 2, mutates, smoke)

Adds a View Size node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_virtual_texture_feature_switch` (risk 2, mutates, smoke)

Adds a Virtual Texture Feature Switch node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.add_world_position` (risk 2, mutates, smoke)

Adds a World Position node.

Argument	Type	Description
`target`	string	required. Material or Material Function asset to add the expression to.
`x`	integer	Default `0`.
`y`	integer	Default `0`.
`desc`	string	Optional description; it becomes a stable selector for later calls.
`compile`	boolean	Recompile the material afterwards (default false; compile once at the end). Default `false`.

Returns: node, target, errors.

`material.arrange_nodes` (risk 2, mutates, smoke)

Auto-arranges the expressions of a material or function graph.

Argument	Type	Description
`target`	string	required. Material or Material Function asset path / unique name.

Returns: count, items.

`material.batch_reparent` (risk 3, mutates, smoke)

Reparents several instances at once.

Argument	Type	Description
`instances`	array of string	required.
`newParent`	string	required.

Returns: count, items.

`material.batch_set_scalar` (risk 2, mutates, smoke)

Sets the same scalar parameter on every instance of a list or a folder.

Argument	Type	Description
`instances`	array of string	Instances to change; leave empty to use "folder".
`folder`	string	Content folder whose instances are changed.
`name`	string	required.
`value`	number	Scalar value (material.batch_set_scalar). Default `0.0`.
`texture`	string	Texture asset (material.batch_set_texture).

Returns: count, items.

`material.batch_set_texture` (risk 2, mutates, smoke)

Sets the same texture parameter on every instance of a list or a folder.

Argument	Type	Description
`instances`	array of string	Instances to change; leave empty to use "folder".
`folder`	string	Content folder whose instances are changed.
`name`	string	required.
`value`	number	Scalar value (material.batch_set_scalar). Default `0.0`.
`texture`	string	Texture asset (material.batch_set_texture).

Returns: count, items.

`material.build_graph` (risk 3, mutates, smoke)

Builds a whole expression graph from a node list and a link list in one call; the fastest way to author a material.

Argument	Type	Description
`target`	string	required.
`nodes`	array of UeaMatBuildNode	required. Expressions to create.
`links`	array of UeaMatLink	Links between the new nodes and to material properties.
`replace`	boolean	Delete the existing expressions first. Default `false`.
`layout`	boolean	Auto-arrange the graph afterwards (default true). Default `true`.
`compile`	boolean	Recompile afterwards (default true). Default `true`.

Returns: nodes, links, comments, nodeCount, linkCount, target.

`material.clear_all_parameters` (risk 5, mutates, destructive, smoke)

Removes every override of an instance.

Argument	Type	Description
`instance`	string	required. Material Instance Constant asset.

Returns: parameters, total, overriddenCount.

`material.clear_graph` (risk 5, mutates, destructive, smoke)

Deletes every expression and comment of a graph.

Argument	Type	Description
`target`	string	required. Material or Material Function asset path / unique name.

Returns: count, items.

`material.clear_parameter` (risk 2, mutates, smoke)

Removes one override so the parameter inherits the parent value again.

Argument	Type	Description
`instance`	string	required.
`name`	string	required.

Returns: parameters, total, overriddenCount.

`material.compare_instances` (risk 0, smoke)

Compares the overrides of two instances.

Argument	Type	Description
`a`	string	required.
`b`	string	required.

Returns: identical, differences, onlyInA, onlyInB, sameParent.

`material.compile` (risk 2, mutates, smoke)

Recompiles a material (or the base material of an instance) and returns the compile errors and the new statistics. Slow: call it once after a batch of graph edits.

Argument	Type	Description
`material`	string	required. Material or material instance asset.

Returns: errors, warnings, errorCount, stats.

`material.connect` (risk 2, mutates, smoke)

Connects an expression output to a material property ("BaseColor") or to another expression input ("Node.Input").

Argument	Type	Description
`target`	string	required.
`node`	string	required. Source expression.
`output`	string	Output name or index (default the first output).
`to`	string	required. Material property ("BaseColor", "Roughness", "CustomizedUV0", ...) or "OtherNode.Input".
`compile`	boolean	Recompile after the change (default false). Default `false`.

Returns: node, target, errors.

`material.connect_many` (risk 2, mutates, smoke)

Makes several connections in one call; reports the ones that failed.

Argument	Type	Description
`target`	string	required.
`links`	array of UeaMatLink	required.
`compile`	boolean	Recompile after the change (default false). Default `false`.

Returns: count, items.

`material.copy_parameters` (risk 2, mutates, smoke)

Copies parameter overrides from one instance (or material) to another.

Argument	Type	Description
`from`	string	required. Source instance or material.
`to`	string	required. Destination instance.
`onlyOverridden`	boolean	Only copy the parameters the source overrides (default true). Default `true`.

Returns: parameters, total, overriddenCount.

`material.create` (risk 2, mutates, smoke)

Creates a Material asset with a domain, blend mode and shading model; optionally copies another material as a template. Returns its settings.

Argument	Type	Description
`folder`	string	required. Destination content folder, e.g. "/Game/Materials".
`name`	string	required. Asset name without path.
`domain`	string	surface (default) / deferred_decal / light_function / volume / post_process / ui / runtime_virtual_texture.
`blendMode`	string	opaque (default) / masked / translucent / additive / modulate / alpha_composite / alpha_holdout.
`shadingModel`	string	default_lit (default) / unlit / subsurface / preintegrated_skin / clear_coat / subsurface_profile / two_sided_foliage / hair / cloth / eye / single_layer_water / thin_translucent / from_material_expression.
`twoSided`	boolean	Render both faces. Default `false`.
`opacityMaskClipValue`	number	Alpha threshold of masked materials (default 0.3333). Default `0.3333`.
`template`	string	Material to copy the expression graph and settings from.
`compile`	boolean	Recompile after creation (default true). Default `true`.
`save`	boolean	Save the package to disk. Default `false`.

Returns: asset, settings, connectedProperties, stats, errors.

`material.create_function` (risk 2, mutates, smoke)

Creates a Material Function with the given input and output declarations, optionally exposing it to the material palette.

Argument	Type	Description
`folder`	string	required.
`name`	string	required.
`description`	string
`exposeToLibrary`	boolean	Publish the function in the material palette. Default `false`.
`libraryCategories`	array of string	Palette categories when exposed.
`inputs`	array of UeaMatFunctionParam	Input declarations to create.
`outputs`	array of string	Output names to create.
`save`	boolean	Default `false`.

Returns: asset, description, exposeToLibrary, libraryCategories, inputs, outputs, nodeCount, users.

`material.create_function_instance` (risk 2, mutates, smoke)

Creates a Material Function Instance from a function (or a material layer / layer blend).

Argument	Type	Description
`function`	string	required. Parent material function (or layer / layer blend).
`folder`	string	required.
`name`	string	required.
`scalars`	array of UeaMatScalarValue
`vectors`	array of UeaMatVectorValue
`textures`	array of UeaMatTextureValue

Returns: asset, errors, notes.

`material.create_instance` (risk 2, mutates, smoke)

Creates a Material Instance Constant from a parent material or instance, applying the given parameter overrides.

Argument	Type	Description
`parent`	string	required. Parent material or material instance.
`folder`	string	required.
`name`	string	required.
`scalars`	array of UeaMatScalarValue
`vectors`	array of UeaMatVectorValue
`textures`	array of UeaMatTextureValue
`switches`	array of UeaMatSwitchValue
`compile`	boolean	Update the instance's shaders after the overrides (default true). Default `true`.
`save`	boolean	Default `false`.

Returns: asset, parent, parentChain, baseMaterial, parameters, overriddenCount, overrides.

`material.create_instance_variants` (risk 2, mutates, smoke)

Creates several instances of the same parent, one per variant, each with its own overrides.

Argument	Type	Description
`parent`	string	required.
`folder`	string	required.
`variants`	array of UeaMatVariant	required.
`save`	boolean	Default `false`.

Returns: assets, total.

`material.create_layer` (risk 2, mutates, UE 5.0+, smoke)

Creates a Material Layer function asset.

Argument	Type	Description
`folder`	string	required.
`name`	string	required.
`description`	string
`save`	boolean	Default `false`.

Returns: asset, errors, notes.

`material.create_layer_blend` (risk 2, mutates, UE 5.0+, smoke)

Creates a Material Layer Blend function asset.

Argument	Type	Description
`folder`	string	required.
`name`	string	required.
`description`	string
`save`	boolean	Default `false`.

Returns: asset, errors, notes.

`material.delete` (risk 3, mutates, destructive, smoke)

Deletes a material asset. References to it are broken.

Argument	Type	Description
`material`	string	required. Material asset path or unique name.

Returns: count, items.

`material.delete_function` (risk 3, mutates, destructive, smoke)

Deletes a material function.

Argument	Type	Description
`function`	string	required. Material Function asset path or unique name.

Returns: count, items.

`material.delete_instance` (risk 3, mutates, destructive, smoke)

Deletes a material instance.

Argument	Type	Description
`instance`	string	required. Material Instance Constant asset.

Returns: count, items.

`material.delete_node` (risk 3, mutates, smoke)

Deletes one expression and breaks every link that touched it.

Argument	Type	Description
`target`	string	required.
`node`	string	required. Expression object name, description, "#index" or parameter name.

Returns: count, items.

`material.delete_nodes` (risk 3, mutates, destructive, smoke)

Deletes several expressions at once.

Argument	Type	Description
`target`	string	required.
`nodes`	array of string	required. Expression selectors.

Returns: count, items.

`material.disconnect` (risk 2, mutates, smoke)

Breaks the connection feeding a material property or an expression input.

Argument	Type	Description
`target`	string	required.
`to`	string	required. Material property ("BaseColor") or "Node.Input".
`compile`	boolean	Recompile after the change (default false). Default `false`.

Returns: count, items.

`material.disconnect_node` (risk 2, mutates, smoke)

Breaks every link that reaches or leaves an expression.

Argument	Type	Description
`target`	string	required.
`node`	string	required.
`outgoing`	boolean	Also unplug the expressions this one feeds (default true). Default `true`.
`incoming`	boolean	Also unplug this expression's own inputs (default true). Default `true`.

Returns: count, items.

`material.duplicate` (risk 2, mutates, smoke)

Duplicates a material into a folder under a new name.

Argument	Type	Description
`material`	string	required. Source asset.
`folder`	string	required. Destination folder.
`name`	string	required. Name of the copy.

Returns: asset, errors, notes.

`material.duplicate_function` (risk 2, mutates, smoke)

Duplicates a material function.

Argument	Type	Description
`material`	string	required. Source asset.
`folder`	string	required. Destination folder.
`name`	string	required. Name of the copy.

Returns: asset, errors, notes.

`material.duplicate_instance` (risk 2, mutates, smoke)

Duplicates a material instance.

Argument	Type	Description
`material`	string	required. Source asset.
`folder`	string	required. Destination folder.
`name`	string	required. Name of the copy.

Returns: asset, errors, notes.

`material.duplicate_node` (risk 2, mutates, smoke)

Duplicates an expression, offset from the original; the copy keeps the property values, not the links.

Argument	Type	Description
`target`	string	required.
`node`	string	required.
`offsetX`	integer	X offset of the copy (default 40). Default `40`.
`offsetY`	integer	Y offset of the copy (default 40). Default `40`.

Returns: node, target, errors.

`material.export_function_graph` (risk 0, smoke)

Exports a function graph as JSON (same format as material.export_graph).

Argument	Type	Description
`function`	string	required. Material Function asset path or unique name.

Returns: json, nodeCount, linkCount.

`material.export_graph` (risk 0, smoke)

Exports the whole expression graph plus the material settings as a JSON document (feed it back to material.import_graph).

Argument	Type	Description
`material`	string	required. Material asset path or unique name.

Returns: json, nodeCount, linkCount.

`material.find_by_expression_class` (risk 0, smoke)

Materials whose graph contains an expression of a given class.

Argument	Type	Description
`reference`	string	required. Texture, function or expression class to look for.
`folder`	string	Content folder to search (default "/Game").
`limit`	integer	Maximum results (default 100). Default `100`.

Returns: assets, total.

`material.find_by_texture` (risk 0, smoke)

Materials whose graph samples a given texture.

Argument	Type	Description
`reference`	string	required. Texture, function or expression class to look for.
`folder`	string	Content folder to search (default "/Game").
`limit`	integer	Maximum results (default 100). Default `100`.

Returns: assets, total.

`material.find_instances_using_texture` (risk 0, smoke)

Material instances referencing a texture through one of their texture parameters.

Argument	Type	Description
`reference`	string	required. Texture, function or expression class to look for.
`folder`	string	Content folder to search (default "/Game").
`limit`	integer	Maximum results (default 100). Default `100`.

Returns: assets, total.

`material.find_node` (risk 0, smoke)

Searches expressions by description, caption, class or parameter name.

Argument	Type	Description
`target`	string	required.
`query`	string	Text matched against the object name, description, caption, class and parameter name.
`class`	string	Restrict to one expression class.
`limit`	integer	Default `50`.

Returns: nodes, total, target.

`material.function_from_nodes` (risk 3, mutates)

Moves a selection of expressions of a material into a new material function, wiring inputs and outputs from the links that crossed the selection. SmokeSkip: it needs an existing multi-node selection in a material, which the sandbox chain only builds in a later class.

Argument	Type	Description
`material`	string	required. Source material.
`nodes`	array of string	required. Expressions to move into the function.
`folder`	string	required.
`name`	string	required.
`replaceWithCall`	boolean	Replace the extracted expressions with a call to the new function (default true). Default `true`.

Returns: asset, description, exposeToLibrary, libraryCategories, inputs, outputs, nodeCount, users.

`material.get` (risk 0, smoke)

Settings, connected material properties and shader statistics of a material.

Argument	Type	Description
`material`	string	required. Material asset path or unique name.

Returns: asset, settings, connectedProperties, stats, errors.

`material.get_compile_errors` (risk 0, smoke)

Compile errors of a material's current shader map, without triggering a recompile.

Argument	Type	Description
`material`	string	required. Material or material instance asset.

Returns: errors, warnings, errorCount, stats.

`material.get_dynamic_instances` (risk 0, requires world, smoke)

Actors of the current level whose components use a dynamic instance created from this material or instance.

Argument	Type	Description
`material`	string	required. Material asset path or unique name.

Returns: values, total.

`material.get_expression_class_info` (risk 0, smoke)

Pins, categories and editable properties of one material expression class.

Argument	Type	Description
`class`	string	required. Expression class name or short alias ("Multiply", "MaterialExpressionMultiply").

Returns: info.

`material.get_function` (risk 0, smoke)

Inputs, outputs, node count, library flags and users of a material function.

Argument	Type	Description
`function`	string	required. Material Function asset path or unique name.

Returns: asset, description, exposeToLibrary, libraryCategories, inputs, outputs, nodeCount, users.

`material.get_function_inputs` (risk 0, smoke)

Input declarations of a material function.

Argument	Type	Description
`function`	string	required. Material Function asset path or unique name.

Returns: params, total.

`material.get_function_outputs` (risk 0, smoke)

Output declarations of a material function.

Argument	Type	Description
`function`	string	required. Material Function asset path or unique name.

Returns: params, total.

`material.get_graph` (risk 0, smoke)

Nodes and links of a graph in one payload: the overview an agent needs before editing.

Argument	Type	Description
`target`	string	required. Material or Material Function asset path / unique name.

Returns: nodes, links, comments, nodeCount, linkCount, target.

`material.get_hierarchy` (risk 0, smoke)

Instances derived from a material, the material functions it calls and the textures it uses.

Argument	Type	Description
`material`	string	required. Material asset path or unique name.

Returns: instances, functions, textures.

`material.get_input_source` (risk 0, smoke)

Expression and output feeding a material property or an expression input.

Argument	Type	Description
`target`	string	required.
`to`	string	required. Material property ("BaseColor") or "Node.Input".

Returns: connected, fromNode, fromClass, fromOutput, fromOutputName.

`material.get_instance` (risk 0, smoke)

Parent chain, every parameter with its value, its parent value and whether the instance overrides it.

Argument	Type	Description
`instance`	string	required. Material Instance Constant asset.

Returns: asset, parent, parentChain, baseMaterial, parameters, overriddenCount, overrides.

`material.get_instance_chain` (risk 0, smoke)

Parent chain of an instance, from the instance itself up to the base material.

Argument	Type	Description
`instance`	string	required. Material Instance Constant asset.

Returns: chain, baseMaterial.

`material.get_instance_overrides` (risk 0, smoke)

Base-property overrides currently active on an instance.

Argument	Type	Description
`instance`	string	required. Material Instance Constant asset.

Returns: overrides, active.

`material.get_layer_parameters` (risk 0, UE 5.0+, smoke)

Parameters exposed by the layers of a material instance, per layer.

Argument	Type	Description
`instance`	string	required.
`layerIndex`	integer	Layer index; negative lists every layer. Default `-1`.

Returns: parameters, total, overriddenCount.

`material.get_layers` (risk 0, UE 5.0+, smoke)

Layer stack of a material (from its layers expression) or of a material instance (from its static parameters).

Argument	Type	Description
`target`	string	required. Material or Material Instance that owns the layer stack.

Returns: layers, total, node.

`material.get_node` (risk 0, smoke)

One expression with its position, description, inputs and outputs.

Argument	Type	Description
`target`	string	required.
`node`	string	required. Expression object name, description, "#index" or parameter name.

Returns: node, target, errors.

`material.get_node_inputs` (risk 0, smoke)

Input pins of an expression with what feeds them.

Argument	Type	Description
`target`	string	required.
`node`	string	required. Expression object name, description, "#index" or parameter name.

Returns: node, target, errors.

`material.get_node_outputs` (risk 0, smoke)

Output pins of an expression.

Argument	Type	Description
`target`	string	required.
`node`	string	required. Expression object name, description, "#index" or parameter name.

Returns: node, target, errors.

`material.get_node_property` (risk 0, smoke)

Reads one property of an expression as text.

Argument	Type	Description
`target`	string	required.
`node`	string	required.
`property`	string	required. Property name on the expression class, e.g. "Texture", "SamplerType", "ConstCoordinate".
`value`	string	New value in text form (numbers, enum names, asset paths).

Returns: value, overridden, parentValue.

`material.get_parameter_info` (risk 0, smoke)

Type, group, sort priority, parent default and override state of one parameter.

Argument	Type	Description
`instance`	string	required.
`name`	string	required.

Returns: parameter.

`material.get_properties_connected` (risk 0, smoke)

Material properties (BaseColor, Roughness, ...) currently driven by an expression.

Argument	Type	Description
`material`	string	required. Material asset path or unique name.

Returns: values, total.

`material.get_scalar` (risk 0, smoke)

Value of one scalar parameter, with the parent value and whether it is overridden.

Argument	Type	Description
`instance`	string	required.
`name`	string	required.

Returns: value, overridden, parentValue.

`material.get_static_switch` (risk 0, smoke)

Value of one static switch parameter.

Argument	Type	Description
`instance`	string	required.
`name`	string	required.

Returns: value, overridden, parentValue.

`material.get_stats` (risk 0, smoke)

Shader instruction counts, sampler and interpolator usage of a material or instance, without recompiling.

Argument	Type	Description
`material`	string	required. Material or material instance asset.

Returns: stats, material.

`material.get_texture` (risk 0, smoke)

Value of one texture parameter.

Argument	Type	Description
`instance`	string	required.
`name`	string	required.

Returns: value, overridden, parentValue.

`material.get_texture_samplers` (risk 0, smoke)

Texture sampler nodes of a material with the sampler type they declare and the one their texture implies.

Argument	Type	Description
`material`	string	required. Material asset path or unique name.

Returns: samplers, total, mismatchCount.

`material.get_vector` (risk 0, smoke)

Value of one vector parameter.

Argument	Type	Description
`instance`	string	required.
`name`	string	required.

Returns: value, overridden, parentValue.

`material.import_function_graph` (risk 3, mutates)

Rebuilds a function graph from JSON. SmokeSkip: the argument is a nested JSON document, which cannot be expressed in smoke metadata.

Argument	Type	Description
`material`	string	required.
`json`	string	required. JSON produced by material.export_graph.
`replace`	boolean	Delete the existing expressions first (default true). Default `true`.
`compile`	boolean	Recompile after the import (default true). Default `true`.

Returns: nodes, links, comments, nodeCount, linkCount, target.

`material.import_graph` (risk 3, mutates)

Rebuilds a material's graph from a JSON document produced by material.export_graph. SmokeSkip: the argument is a nested JSON document, which cannot be expressed in smoke metadata.

Argument	Type	Description
`material`	string	required.
`json`	string	required. JSON produced by material.export_graph.
`replace`	boolean	Delete the existing expressions first (default true). Default `true`.
`compile`	boolean	Recompile after the import (default true). Default `true`.

Returns: nodes, links, comments, nodeCount, linkCount, target.

`material.inline_function_call` (risk 3, mutates)

Expands a Material Function Call node into the calling graph. SmokeSkip: it needs an existing function-call node, which the sandbox chain only creates in a later class.

Argument	Type	Description
`target`	string	required.
`node`	string	required. The MaterialFunctionCall expression to expand.

Returns: nodes, links, comments, nodeCount, linkCount, target.

`material.is_connected` (risk 0, smoke)

True when a material property or an expression input is driven by something.

Argument	Type	Description
`target`	string	required.
`to`	string	required. Material property ("BaseColor") or "Node.Input".

Returns: value, detail.

`material.list` (risk 0, smoke)

Lists Material assets under a folder, filtered by domain, blend mode and name.

Argument	Type	Description
`folder`	string	Content folder to search (default "/Game").
`domain`	string	Only materials with this domain.
`blendMode`	string	Only materials with this blend mode.
`nameContains`	string	Name substring filter.
`recursive`	boolean	Search subfolders (default true). Default `true`.
`limit`	integer	Maximum results (default 200). Default `200`.

Returns: assets, total.

`material.list_comments` (risk 0, smoke)

Comment boxes of a graph.

Argument	Type	Description
`target`	string	required. Material or Material Function asset path / unique name.

Returns: comments, total.

`material.list_engine_functions` (risk 0, smoke)

Material functions shipped with the engine, by category (cached asset-registry query).

Argument	Type	Description
`folder`	string	Content folder (default "/Game").
`exposedOnly`	boolean	Only functions exposed to the material palette. Default `false`.
`category`	string	Library category filter.
`nameContains`	string
`recursive`	boolean	Default `true`.
`limit`	integer	Default `200`.

Returns: functions, total, categories.

`material.list_expression_classes` (risk 0, smoke)

Every material expression class available on this engine with its pins and editable properties. Use it before material.add_node.

Argument	Type	Description
`nameContains`	string	Name substring filter (e.g. "texture").
`category`	string	Editor category filter (e.g. "Math").
`limit`	integer	Maximum results (default 200). Default `200`.

Returns: classes, total.

`material.list_function_library` (risk 0, smoke)

The material function palette: every exposed function grouped by category, with its inputs and outputs.

Argument	Type	Description
`folder`	string	Content folder (default "/Game").
`exposedOnly`	boolean	Only functions exposed to the material palette. Default `false`.
`category`	string	Library category filter.
`nameContains`	string
`recursive`	boolean	Default `true`.
`limit`	integer	Default `200`.

Returns: functions, total, categories.

`material.list_function_users` (risk 0, smoke)

Materials and functions that call a given function.

Argument	Type	Description
`function`	string	required. Material Function asset path or unique name.

Returns: assets, total.

`material.list_functions` (risk 0, smoke)

Lists Material Function assets under a folder, optionally only the exposed ones.

Argument	Type	Description
`folder`	string	Content folder (default "/Game").
`exposedOnly`	boolean	Only functions exposed to the material palette. Default `false`.
`category`	string	Library category filter.
`nameContains`	string
`recursive`	boolean	Default `true`.
`limit`	integer	Default `200`.

Returns: assets, total.

`material.list_instance_parameters` (risk 0, smoke)

Parameters of an instance, optionally only the ones it overrides.

Argument	Type	Description
`instance`	string	required.
`overriddenOnly`	boolean	Only parameters this instance overrides. Default `false`.
`type`	string	Only parameters of this type (scalar / vector / texture / switch).

Returns: parameters, total, overriddenCount.

`material.list_instances` (risk 0, smoke)

Lists Material Instance Constants, optionally only those derived from a given parent.

Argument	Type	Description
`parent`	string	Only instances derived from this material or instance.
`folder`	string	Content folder (default "/Game").
`recursive`	boolean	Default `true`.
`includeIndirect`	boolean	Include grandchildren of the parent (default true). Default `true`.
`limit`	integer	Default `200`.

Returns: assets, total.

`material.list_layer_blends` (risk 0, UE 5.0+, smoke)

Lists Material Layer Blend assets under a folder.

Argument	Type	Description
`folder`	string	Content folder (default "/Game").
`exposedOnly`	boolean	Only functions exposed to the material palette. Default `false`.
`category`	string	Library category filter.
`nameContains`	string
`recursive`	boolean	Default `true`.
`limit`	integer	Default `200`.

Returns: assets, total.

`material.list_layers` (risk 0, UE 5.0+, smoke)

Lists Material Layer assets under a folder.

Argument	Type	Description
`folder`	string	Content folder (default "/Game").
`exposedOnly`	boolean	Only functions exposed to the material palette. Default `false`.
`category`	string	Library category filter.
`nameContains`	string
`recursive`	boolean	Default `true`.
`limit`	integer	Default `200`.

Returns: assets, total.

`material.list_nodes` (risk 0, smoke)

Expressions of a material or function graph, with their pins and connections.

Argument	Type	Description
`target`	string	required.
`classFilter`	string	Only expressions of this class ("TextureSample", "MaterialExpressionMultiply").
`nameContains`	string	Name/desc/caption substring filter.
`limit`	integer	Maximum results (default 500). Default `500`.

Returns: nodes, total, target.

`material.list_parameters` (risk 0, smoke)

Parameters declared by a material or material function graph, with group, default and slider range.

Argument	Type	Description
`target`	string	required. Material or Material Function asset.
`type`	string	Only parameters of this type (scalar / vector / texture / switch).
`group`	string	Only parameters of this group.

Returns: parameters, total, groups.

`material.list_recipes` (risk 0, smoke)

Lists the recipes of this kit with the kind of material each produces.

No arguments.

Returns: recipes, total.

`material.list_textures` (risk 0, smoke)

Textures referenced by a material's graph.

Argument	Type	Description
`material`	string	required. Material asset path or unique name.

Returns: textures, total.

`material.list_usages` (risk 0, smoke)

Every bUsedWith* flag this engine supports and the ones enabled on the material.

Argument	Type	Description
`material`	string	required. Material asset path or unique name.

Returns: available, enabled.

`material.move_node` (risk 2, mutates, smoke)

Moves one expression to an absolute graph position.

Argument	Type	Description
`target`	string	required.
`node`	string	required.
`x`	integer	Default `0`.
`y`	integer	Default `0`.

Returns: node, target, errors.

`material.move_nodes` (risk 2, mutates, smoke)

Moves several expressions (or the whole graph) by a delta.

Argument	Type	Description
`target`	string	required.
`nodes`	array of string	Expressions to move; empty moves the whole graph.
`dx`	integer	Default `0`.
`dy`	integer	Default `0`.

Returns: count, items.

`material.recipe_checker` (risk 2, mutates, smoke)

Procedural checkerboard, no textures needed. The quickest sanity-check material.

Argument	Type	Description
`colorA`	UeaMatColor
`colorB`	UeaMatColor
`scale`	number	Default `8.0`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_cloth` (risk 2, mutates, smoke)

Cloth shading model with a fuzz colour and amount.

Argument	Type	Description
`baseColor`	string
`baseColorTint`	UeaMatColor
`normal`	string
`roughness`	number	Default `0.5`.
`subsurfaceColor`	UeaMatColor	Subsurface / fuzz colour depending on the recipe.
`amount`	number	Cloth fuzz amount or subsurface opacity. Default `0.5`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_decal` (risk 2, mutates, smoke)

Deferred decal material with base colour, normal and opacity.

Argument	Type	Description
`baseColor`	string
`tint`	UeaMatColor
`normal`	string
`opacityTexture`	string	Texture whose alpha drives the decal opacity.
`opacity`	number	Default `1.0`.
`dbuffer`	boolean	Use a DBuffer decal blend mode. Default `false`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_dissolve` (risk 2, mutates, smoke)

Dissolve effect: a noise source drives an opacity mask with a glowing edge.

Argument	Type	Description
`baseColor`	string
`baseColorTint`	UeaMatColor
`noiseTexture`	string	Noise texture; when empty a procedural Noise node is used.
`amount`	number	Initial dissolve amount (0..1). Default `0.5`.
`edgeColor`	UeaMatColor
`edgeWidth`	number	Default `0.05`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_emissive` (risk 2, mutates, smoke)

Emissive material with an intensity and an optional sine pulse.

Argument	Type	Description
`color`	UeaMatColor
`intensity`	number	Default `5.0`.
`pulse`	number	Pulse speed; 0 disables the animation. Default `0.0`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_flipbook` (risk 2, mutates, smoke)

Flipbook animation over a sprite-sheet texture (columns x rows at a frame rate).

Argument	Type	Description
`texture`	string
`columns`	integer	Default `4`.
`rows`	integer	Default `4`.
`fps`	number	Default `15.0`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_from_texture_folder` (risk 2, mutates, dryRun, smoke)

Detects a T_*_BC / _N / _ORM / _R texture set in a folder and builds the matching PBR material.

Argument	Type	Description
`textureFolder`	string	required. Folder holding the texture set.
`nameContains`	string	Only textures whose name contains this.
`dryRun`	boolean	Report the detected mapping without creating anything. Default `false`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_glass` (risk 2, mutates, smoke)

Glass: translucent, low roughness, Fresnel-driven opacity and an index of refraction.

Argument	Type	Description
`tint`	UeaMatColor
`roughness`	number	Default `0.05`.
`ior`	number	Default `1.52`.
`opacity`	number	Default `0.1`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_gradient` (risk 2, mutates, smoke)

Two-colour gradient along the U or V axis.

Argument	Type	Description
`colorA`	UeaMatColor
`colorB`	UeaMatColor
`axis`	string	u (default) or v.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_hologram` (risk 2, mutates, smoke)

Hologram: translucent scanlines scrolling over an emissive tint.

Argument	Type	Description
`color`	UeaMatColor
`scanlineDensity`	number	Default `40.0`.
`speed`	number	Default `0.5`.
`opacity`	number	Default `0.6`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_landscape` (risk 2, mutates, smoke)

Landscape material blending several layers with a Landscape Layer Blend node.

Argument	Type	Description
`layers`	array of UeaMatRecipeLandscapeLayer	required.
`blendType`	string	weight (default) / alpha / height.
`macroVariation`	boolean	Add a large-scale noise variation on top of the blend. Default `false`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_masked` (risk 2, mutates, smoke)

Masked (cutout) material driven by a texture alpha; optionally two-sided foliage.

Argument	Type	Description
`texture`	string	Texture whose alpha drives the mask (and whose RGB drives base colour).
`maskTexture`	string	Separate opacity-mask texture.
`clipValue`	number	Default `0.3333`.
`twoSided`	boolean	Default `true`.
`foliage`	boolean	Use the two-sided foliage shading model with this subsurface colour. Default `false`.
`subsurfaceColor`	UeaMatColor

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_panner` (risk 2, mutates, smoke)

Scrolling texture (Panner) feeding base colour.

Argument	Type	Description
`texture`	string
`speedX`	number	Default `0.1`.
`speedY`	number	Default `0.0`.
`tiling`	number	Default `1.0`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_parallax` (risk 2, mutates, smoke)

Parallax (bump offset) material using a height texture.

Argument	Type	Description
`baseColor`	string
`height`	string
`normal`	string
`heightRatio`	number	Default `0.05`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_pbr` (risk 2, mutates, smoke)

Physically based opaque surface from a texture set (base colour, normal, roughness, metallic, AO, emissive or a packed ORM texture).

Argument	Type	Description
`baseColor`	string	Base colour texture; empty uses the colour below.
`baseColorTint`	UeaMatColor	Base colour when no texture is given.
`normal`	string	Normal map texture.
`roughness`	string	Roughness texture; empty uses roughnessValue.
`roughnessValue`	number	Default `0.5`.
`metallic`	string	Metallic texture; empty uses metallicValue.
`metallicValue`	number	Default `0.0`.
`ao`	string	Ambient occlusion texture.
`emissive`	string	Emissive texture.
`emissiveTint`	UeaMatColor
`emissiveIntensity`	number	Default `0.0`.
`packedOrm`	string	Packed occlusion/roughness/metallic texture (R=AO, G=Roughness, B=Metallic).
`tiling`	number	UV tiling applied to every texture. Default `1.0`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_post_process` (risk 2, mutates, smoke)

Post-process material applying a tint, a desaturation or a vignette.

Argument	Type	Description
`effect`	string	tint / desaturate / vignette.
`color`	UeaMatColor
`intensity`	number	Default `1.0`.
`blendableLocation`	string	before_tonemapping (default) / after_tonemapping / before_translucency / replacing_tonemapper.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_rim_light` (risk 2, mutates, smoke)

Base colour plus a Fresnel rim light added to the emissive output.

Argument	Type	Description
`baseColorTint`	UeaMatColor
`rimColor`	UeaMatColor
`exponent`	number	Default `4.0`.
`intensity`	number	Default `2.0`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_subsurface_skin` (risk 2, mutates, smoke)

Subsurface skin material (preintegrated skin shading model).

Argument	Type	Description
`baseColor`	string
`baseColorTint`	UeaMatColor
`normal`	string
`roughness`	number	Default `0.5`.
`subsurfaceColor`	UeaMatColor	Subsurface / fuzz colour depending on the recipe.
`amount`	number	Cloth fuzz amount or subsurface opacity. Default `0.5`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_translucent` (risk 2, mutates, smoke)

Translucent material with a colour, an opacity and an optional Fresnel falloff.

Argument	Type	Description
`color`	UeaMatColor
`opacity`	number	Default `0.5`.
`fresnel`	boolean	Add a Fresnel term to the opacity. Default `false`.
`ior`	number	Default `1.0`.
`unlit`	boolean	Use the unlit shading model. Default `false`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_triplanar` (risk 2, mutates, smoke)

Triplanar (world-aligned) projection of a base colour and a normal map.

Argument	Type	Description
`baseColor`	string
`normal`	string
`scale`	number	Default `256.0`.
`sharpness`	number	Default `4.0`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_two_sided_foliage` (risk 2, mutates, smoke)

Two-sided foliage: subsurface colour transmitted through thin leaves.

Argument	Type	Description
`baseColor`	string
`baseColorTint`	UeaMatColor
`normal`	string
`roughness`	number	Default `0.5`.
`subsurfaceColor`	UeaMatColor	Subsurface / fuzz colour depending on the recipe.
`amount`	number	Cloth fuzz amount or subsurface opacity. Default `0.5`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_ui` (risk 2, mutates, smoke)

UI (widget) material: a texture tinted and faded, in the User Interface domain.

Argument	Type	Description
`texture`	string
`tint`	UeaMatColor
`opacity`	number	Default `1.0`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_unlit_color` (risk 2, mutates, smoke)

Flat unlit colour. The cheapest material there is; ideal for blockouts and debug.

Argument	Type	Description
`color`	UeaMatColor

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_vertex_color` (risk 2, mutates, smoke)

Uses the mesh vertex colour as base colour.

Argument	Type	Description
`folder`	string	Destination folder (ignored when "material" points at an existing asset).
`name`	string	Name of the material to create.
`material`	string	Existing material to fill instead of creating one (its graph is cleared).
`parameterize`	boolean	Expose the recipe's inputs as material parameters (default true). Default `true`.
`group`	string	Parameter group used when parameterizing.
`compile`	boolean	Recompile at the end (default true). Default `true`.
`save`	boolean	Save the package. Default `false`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.recipe_water_simple` (risk 2, mutates, smoke)

Simple water surface: scrolling normals, a tinted translucent body and a Fresnel rim.

Argument	Type	Description
`normal`	string	Normal map scrolled over the surface.
`speed`	number	Default `0.05`.
`color`	UeaMatColor
`opacity`	number	Default `0.6`.
`fresnel`	boolean	Default `true`.

Returns: asset, nodes, parameters, errors, nodeCount.

`material.remove_function_input` (risk 3, mutates, smoke)

Removes one input declaration from a function.

Argument	Type	Description
`function`	string	required.
`name`	string	required.
`newName`	string	New name (material.rename_function_input).

Returns: params, total.

`material.remove_function_output` (risk 3, mutates, smoke)

Removes one output declaration from a function.

Argument	Type	Description
`function`	string	required.
`name`	string	required.
`newName`	string	New name (material.rename_function_input).

Returns: params, total.

`material.remove_layer` (risk 3, mutates, UE 5.0+, smoke)

Removes one layer (and its blend) from the stack.

Argument	Type	Description
`target`	string	required.
`index`	integer	required.
`visible`	boolean	Visibility for material.set_layer_visible. Default `true`.
`newIndex`	integer	New index for material.reorder_layer. Default `0`.
`asset`	string	Layer or blend asset for material.set_layer_asset.
`slot`	string	"layer" (default) or "blend" for material.set_layer_asset.

Returns: layers, total, node.

`material.rename` (risk 2, mutates, smoke)

Renames a material asset in place.

Argument	Type	Description
`material`	string	required.
`newName`	string	required.

Returns: asset, errors, notes.

`material.rename_function` (risk 2, mutates, smoke)

Renames a material function.

Argument	Type	Description
`material`	string	required.
`newName`	string	required.

Returns: asset, errors, notes.

`material.rename_function_input` (risk 2, mutates, smoke)

Renames a function input. Materials calling the function keep their connection by index.

Argument	Type	Description
`function`	string	required.
`name`	string	required.
`newName`	string	New name (material.rename_function_input).

Returns: params, total.

`material.rename_instance` (risk 2, mutates, smoke)

Renames a material instance.

Argument	Type	Description
`material`	string	required.
`newName`	string	required.

Returns: asset, errors, notes.

`material.rename_parameter` (risk 3, mutates, smoke)

Renames a parameter declaration. Instances referencing the old name lose their override.

Argument	Type	Description
`target`	string	required. Material or Material Function asset.
`name`	string	required. Parameter name.
`group`	string	New parameter group.
`value`	string	New default value (number, "(R=1,G=0,B=0,A=1)" or a texture asset path).
`newName`	string	New name (material.rename_parameter).
`min`	number	Slider minimum (scalar parameters). Default `0.0`.
`max`	number	Slider maximum (scalar parameters). Default `0.0`.
`sortPriority`	integer	Sort priority in the details panel; negative keeps the current value. Default `-1`.

Returns: parameter.

`material.reorder_layer` (risk 2, mutates, UE 5.0+, smoke)

Moves one layer to another position in the stack.

Argument	Type	Description
`target`	string	required.
`index`	integer	required.
`visible`	boolean	Visibility for material.set_layer_visible. Default `true`.
`newIndex`	integer	New index for material.reorder_layer. Default `0`.
`asset`	string	Layer or blend asset for material.set_layer_asset.
`slot`	string	"layer" (default) or "blend" for material.set_layer_asset.

Returns: layers, total, node.

`material.replace_node_class` (risk 3, mutates, smoke)

Replaces an expression with another class, reconnecting the inputs whose names match.

Argument	Type	Description
`target`	string	required.
`node`	string	required.
`newClass`	string	required. New expression class or alias.

Returns: node, target, errors.

`material.replace_texture` (risk 2, mutates, smoke)

Replaces every reference to one texture with another across the whole graph. Returns the expressions it changed.

Argument	Type	Description
`material`	string	required.
`from`	string	required. Texture currently referenced.
`to`	string	required. Replacement texture.
`compile`	boolean	Recompile afterwards. Default `false`.

Returns: count, items.

`material.reset_to_parent` (risk 5, mutates, destructive, smoke)

Resets an instance to its parent: every override is dropped.

Argument	Type	Description
`instance`	string	required. Material Instance Constant asset.

Returns: asset, parent, parentChain, baseMaterial, parameters, overriddenCount, overrides.

`material.save` (risk 2, mutates, smoke)

Saves a material package to disk.

Argument	Type	Description
`material`	string	required. Material asset path or unique name.

Returns: asset, errors, notes.

`material.save_function` (risk 2, mutates, smoke)

Saves a material function package to disk.

Argument	Type	Description
`function`	string	required. Material Function asset path or unique name.

Returns: asset, errors, notes.

`material.save_instance` (risk 2, mutates, smoke)

Saves a material instance package to disk.

Argument	Type	Description
`instance`	string	required. Material Instance Constant asset.

Returns: asset, errors, notes.

`material.set_function_input` (risk 2, mutates, smoke)

Changes the type, preview value, sort priority and description of one function input.

Argument	Type	Description
`function`	string	required.
`name`	string	required.
`type`	string
`previewValue`	UeaMatColor
`sortPriority`	integer	Negative keeps the current value. Default `-1`.
`description`	string
`usePreviewAsDefault`	string	"true" / "false"; empty keeps the current state.

Returns: params, total.

`material.set_function_instance_parameters` (risk 2, mutates, smoke)

Sets the parameter overrides of a Material Function Instance.

Argument	Type	Description
`instance`	string	required. Material Function Instance asset.
`scalars`	array of UeaMatScalarValue
`vectors`	array of UeaMatVectorValue
`textures`	array of UeaMatTextureValue

Returns: asset, errors, notes.

`material.set_function_settings` (risk 2, mutates, smoke)

Changes the description, the expose-to-library flag and the palette categories of a function.

Argument	Type	Description
`function`	string	required.
`description`	string
`exposeToLibrary`	string	"true" / "false"; empty keeps the current state.
`categories`	array of string

Returns: asset, description, exposeToLibrary, libraryCategories, inputs, outputs, nodeCount, users.

`material.set_instance_overrides` (risk 2, mutates, smoke)

Overrides blend mode, shading model, two-sided, dithered LOD, opacity mask clip value and shadow flags on an instance. Pass "inherit" to drop an override.

Argument	Type	Description
`instance`	string	required.
`blendMode`	string	Blend mode override; "inherit" removes the override.
`shadingModel`	string	Shading model override; "inherit" removes the override.
`twoSided`	string	"true" / "false" / "inherit".
`ditheredLODTransition`	string	"true" / "false" / "inherit".
`castDynamicShadowAsMasked`	string	"true" / "false" / "inherit".
`outputTranslucentVelocity`	string	"true" / "false" / "inherit" (5.x only).
`opacityMaskClipValue`	number	Alpha threshold override; negative keeps the current state. Default `-1.0`.
`clearOpacityMaskClipValue`	boolean	Remove the opacity-mask-clip-value override. Default `false`.

Returns: overrides, active.

`material.set_instance_physical_material` (risk 2, mutates, smoke)

Sets (or clears) the physical material override of an instance.

Argument	Type	Description
`material`	string	required.
`physicalMaterial`	string	Physical material asset; empty clears it.

Returns: asset, parent, parentChain, baseMaterial, parameters, overriddenCount, overrides.

`material.set_layer_asset` (risk 2, mutates, UE 5.0+, smoke)

Replaces the layer or blend asset used at one position of the stack.

Argument	Type	Description
`target`	string	required.
`index`	integer	required.
`visible`	boolean	Visibility for material.set_layer_visible. Default `true`.
`newIndex`	integer	New index for material.reorder_layer. Default `0`.
`asset`	string	Layer or blend asset for material.set_layer_asset.
`slot`	string	"layer" (default) or "blend" for material.set_layer_asset.

Returns: layers, total, node.

`material.set_layer_parameter` (risk 2, mutates, UE 5.0+)

Overrides one parameter inside a layer (or its blend) of a material instance. SmokeSkip: it needs an instance whose parent exposes a layer stack with parameters, which the sandbox chain does not build.

Argument	Type	Description
`instance`	string	required. Material Instance Constant that owns the layer stack.
`layerIndex`	integer	required.
`name`	string	required.
`kind`	string	scalar (default) / vector / texture / switch.
`value`	string	Value as text: a number, "(R=..,G=..,B=..,A=..)", a texture path or true/false.
`blend`	boolean	Target the blend function of the layer instead of the layer itself. Default `false`.

Returns: value, overridden, parentValue.

`material.set_layer_visible` (risk 2, mutates, UE 5.0+, smoke)

Shows or hides one layer of the stack.

Argument	Type	Description
`target`	string	required.
`index`	integer	required.
`visible`	boolean	Visibility for material.set_layer_visible. Default `true`.
`newIndex`	integer	New index for material.reorder_layer. Default `0`.
`asset`	string	Layer or blend asset for material.set_layer_asset.
`slot`	string	"layer" (default) or "blend" for material.set_layer_asset.

Returns: layers, total, node.

`material.set_layers` (risk 3, mutates, UE 5.0+, smoke)

Replaces the whole layer stack of a material: layers[0] is the background, blends[i] blends layers[i+1] onto the result.

Argument	Type	Description
`target`	string	required.
`layers`	array of string	required. Material layer function assets, background first.
`blends`	array of string	Blend function assets; one per layer above the background.
`names`	array of string	Display names.

Returns: layers, total, node.

`material.set_node_desc` (risk 2, mutates, smoke)

Sets the description of an expression; it becomes a stable selector for later calls.

Argument	Type	Description
`target`	string	required.
`node`	string	required.
`desc`	string	New description; it doubles as a stable selector for later calls.

Returns: node, target, errors.

`material.set_node_properties` (risk 2, mutates, smoke)

Sets several properties of an expression in one call.

Argument	Type	Description
`target`	string	required.
`node`	string	required.
`properties`	array of UeaKeyValue	required. Property name/value pairs.

Returns: node, target, errors.

`material.set_node_property` (risk 2, mutates, smoke)

Sets one property of an expression from text (numbers, enum names, asset paths).

Argument	Type	Description
`target`	string	required.
`node`	string	required.
`property`	string	required. Property name on the expression class, e.g. "Texture", "SamplerType", "ConstCoordinate".
`value`	string	New value in text form (numbers, enum names, asset paths).

Returns: node, target, errors.

`material.set_parameter_default` (risk 2, mutates, smoke)

Changes the default value of a parameter declaration.

Argument	Type	Description
`target`	string	required. Material or Material Function asset.
`name`	string	required. Parameter name.
`group`	string	New parameter group.
`value`	string	New default value (number, "(R=1,G=0,B=0,A=1)" or a texture asset path).
`newName`	string	New name (material.rename_parameter).
`min`	number	Slider minimum (scalar parameters). Default `0.0`.
`max`	number	Slider maximum (scalar parameters). Default `0.0`.
`sortPriority`	integer	Sort priority in the details panel; negative keeps the current value. Default `-1`.

Returns: parameter.

`material.set_parameter_group` (risk 2, mutates, smoke)

Moves a parameter to another group in the details panel.

Argument	Type	Description
`target`	string	required. Material or Material Function asset.
`name`	string	required. Parameter name.
`group`	string	New parameter group.
`value`	string	New default value (number, "(R=1,G=0,B=0,A=1)" or a texture asset path).
`newName`	string	New name (material.rename_parameter).
`min`	number	Slider minimum (scalar parameters). Default `0.0`.
`max`	number	Slider maximum (scalar parameters). Default `0.0`.
`sortPriority`	integer	Sort priority in the details panel; negative keeps the current value. Default `-1`.

Returns: parameter.

`material.set_parameter_range` (risk 2, mutates, smoke)

Sets the slider minimum and maximum of a scalar parameter.

Argument	Type	Description
`target`	string	required. Material or Material Function asset.
`name`	string	required. Parameter name.
`group`	string	New parameter group.
`value`	string	New default value (number, "(R=1,G=0,B=0,A=1)" or a texture asset path).
`newName`	string	New name (material.rename_parameter).
`min`	number	Slider minimum (scalar parameters). Default `0.0`.
`max`	number	Slider maximum (scalar parameters). Default `0.0`.
`sortPriority`	integer	Sort priority in the details panel; negative keeps the current value. Default `-1`.

Returns: parameter.

`material.set_parameters` (risk 2, mutates, smoke)

Overrides several parameters of an instance in one call.

Argument	Type	Description
`instance`	string	required.
`scalars`	array of UeaMatScalarValue
`vectors`	array of UeaMatVectorValue
`textures`	array of UeaMatTextureValue
`switches`	array of UeaMatSwitchValue
`compile`	boolean	Update the instance afterwards (default true). Default `true`.

Returns: parameters, total, overriddenCount.

`material.set_parent` (risk 2, mutates, smoke)

Reparents an instance; the overrides whose parameter names still exist are kept.

Argument	Type	Description
`instance`	string	required.
`parent`	string	required.

Returns: asset, parent, parentChain, baseMaterial, parameters, overriddenCount, overrides.

`material.set_physical_material` (risk 2, mutates, smoke)

Sets (or clears) the physical material of a material.

Argument	Type	Description
`material`	string	required.
`physicalMaterial`	string	Physical material asset; empty clears it.

Returns: asset, settings, connectedProperties, stats, errors.

`material.set_preview_mesh` (risk 2, mutates)

Sets the mesh shown in the material editor preview viewport. SmokeSkip: it only affects editor UI state and needs a viewport.

Argument	Type	Description
`material`	string	required.
`mesh`	string	required. sphere / cube / plane / cylinder, or a static-mesh asset path.

Returns: asset, errors, notes.

`material.set_scalar` (risk 2, mutates, smoke)

Overrides one scalar parameter.

Argument	Type	Description
`instance`	string	required.
`name`	string	required.
`value`	number	required.

Returns: value, overridden, parentValue.

`material.set_settings` (risk 2, mutates, smoke)

Changes domain, blend mode, shading model, two-sided, opacity mask clip value, customized UVs, decal response, usage flags and more. Only the fields you pass are touched.

Argument	Type	Description
`material`	string	required.
`domain`	string
`blendMode`	string
`shadingModel`	string
`shadingModels`	array of string	Extra shading models to allow (5.x, materials using "from_material_expression").
`twoSided`	string	"true"/"false" to change it; empty to keep.
`opacityMaskClipValue`	number	Alpha threshold of masked materials; negative keeps the current value. Default `-1.0`.
`ditheredLODTransition`	string
`tangentSpaceNormal`	string
`numCustomizedUVs`	integer	Number of customized UV outputs (0..8); negative keeps the current value. Default `-1`.
`allowNegativeEmissive`	string
`blendableLocation`	string	Post-process blendable location (before_tonemapping / after_tonemapping / before_translucency / ...).
`refractionMethod`	string	Refraction method (5.x only): none / index_of_refraction / pixel_normal_offset.
`materialDecalResponse`	string	none / color_normal_roughness / color / color_normal / color_roughness / normal / normal_roughness / roughness.
`castRayTracedShadows`	string
`usage`	array of string	bUsedWith* flags to enable, by short name ("skeletal_mesh", "particle_sprites", "niagara_sprites", "instanced_static_meshes", "static_lighting", ...).
`subsurfaceProfile`	string	Subsurface profile asset.
`compile`	boolean	Recompile after the change (default false: batch settings then call material.compile). Default `false`.

Returns: asset, settings, connectedProperties, stats, errors.

`material.set_sort_priority` (risk 2, mutates, smoke)

Sets the sort priority of a parameter in the details panel.

Argument	Type	Description
`target`	string	required. Material or Material Function asset.
`name`	string	required. Parameter name.
`group`	string	New parameter group.
`value`	string	New default value (number, "(R=1,G=0,B=0,A=1)" or a texture asset path).
`newName`	string	New name (material.rename_parameter).
`min`	number	Slider minimum (scalar parameters). Default `0.0`.
`max`	number	Slider maximum (scalar parameters). Default `0.0`.
`sortPriority`	integer	Sort priority in the details panel; negative keeps the current value. Default `-1`.

Returns: parameter.

`material.set_static_component_mask` (risk 2, mutates)

Overrides one static component mask parameter. SmokeSkip: it needs a StaticComponentMaskParameter declared in the parent material, which the sandbox chain does not create.

Argument	Type	Description
`instance`	string	required.
`name`	string	required.
`r`	boolean	Default `true`.
`g`	boolean	Default `false`.
`b`	boolean	Default `false`.
`a`	boolean	Default `false`.

Returns: value, overridden, parentValue.

`material.set_static_switch` (risk 2, mutates, smoke)

Overrides one static switch parameter (changes the shader permutation).

Argument	Type	Description
`instance`	string	required.
`name`	string	required.
`value`	boolean	Default `true`.

Returns: value, overridden, parentValue.

`material.set_subsurface_profile` (risk 2, mutates, smoke)

Sets (or clears, when the asset is empty) the subsurface profile override of an instance.

Argument	Type	Description
`material`	string	required.
`physicalMaterial`	string	Physical material asset; empty clears it.

Returns: asset, parent, parentChain, baseMaterial, parameters, overriddenCount, overrides.

`material.set_texture` (risk 2, mutates, smoke)

Overrides one texture parameter.

Argument	Type	Description
`instance`	string	required.
`name`	string	required.
`texture`	string	required. Texture asset path.

Returns: value, overridden, parentValue.

`material.set_usage` (risk 2, mutates, smoke)

Enables or disables one bUsedWith* flag of a material (skeletal_mesh, particle_sprites, instanced_static_meshes, ...).

Argument	Type	Description
`material`	string	required.
`usage`	string	required. Short usage name: skeletal_mesh, particle_sprites, beam_trails, mesh_particles, static_lighting, morph_targets, spline_mesh, instanced_static_meshes, geometry_collections, clothing, niagara_sprites, niagara_ribbons, niagara_mesh_particles, geometry_cache, water, hair_strands, lidar_point_cloud, virtual_heightfield_mesh (5.x adds nanite, static_mesh, volumetric_cloud, ...).
`enabled`	boolean	True to enable (default), false to disable. Default `true`.

Returns: available, enabled.

`material.set_vector` (risk 2, mutates, smoke)

Overrides one vector (colour) parameter.

Argument	Type	Description
`instance`	string	required.
`name`	string	required.
`color`	UeaMatColor

Returns: value, overridden, parentValue.

`material.update_function` (risk 2, mutates, smoke)

Recompiles the materials that call a function after its graph changed.

Argument	Type	Description
`function`	string	required. Material Function asset path or unique name.

Returns: count, items.

`material.validate` (risk 0, smoke)

Checks a material for unconnected required inputs, missing textures, sampler-type mismatches and unused parameters.

Argument	Type	Description
`material`	string	required. Material asset path or unique name.

Returns: valid, issues, errorCount, warningCount.

`material.validate_function` (risk 0, smoke)

Checks a function for unconnected outputs, unused inputs and duplicate names.

Argument	Type	Description
`function`	string	required. Material Function asset path or unique name.

Returns: valid, issues, errorCount, warningCount.

Guide
Class map
Start here
Recipe workflow (fastest path)
Graph workflow
Compiling
Instances
Functions and the library
Layers (UE 5.0+)
Gotchas
Tools

Guide​

Class map​

Start here​

Recipe workflow (fastest path)​

Graph workflow​

Compiling​

Instances​

Functions and the library​

Layers (UE 5.0+)​

Gotchas​

Tools​

material.add_actor_position (risk 2, mutates, smoke)​

material.add_blackbody (risk 2, mutates, smoke)​

material.add_bump_offset (risk 2, mutates, smoke)​

material.add_camera_position (risk 2, mutates, smoke)​

material.add_camera_vector (risk 2, mutates, smoke)​

material.add_collection_parameter (risk 2, mutates)​

material.add_comment (risk 2, mutates, smoke)​

material.add_comment_around (risk 2, mutates, smoke)​

material.add_component_mask (risk 2, mutates, smoke)​

material.add_constant (risk 2, mutates, smoke)​

material.add_constant2 (risk 2, mutates, smoke)​

material.add_constant3 (risk 2, mutates, smoke)​

material.add_constant4 (risk 2, mutates, smoke)​

material.add_curve_atlas_row_parameter (risk 2, mutates, smoke)​

material.add_custom (risk 2, mutates, smoke)​

material.add_ddx (risk 2, mutates, smoke)​

material.add_ddy (risk 2, mutates, smoke)​

material.add_depth_fade (risk 2, mutates, smoke)​

material.add_depth_of_field_function (risk 2, mutates, smoke)​

material.add_desaturation (risk 2, mutates, smoke)​

material.add_distance_to_nearest_surface (risk 2, mutates, smoke)​

material.add_dynamic_parameter (risk 2, mutates, smoke)​

material.add_eye_adaptation (risk 2, mutates, smoke)​

material.add_feature_level_switch (risk 2, mutates, smoke)​

material.add_fresnel (risk 2, mutates, smoke)​

material.add_function_call (risk 2, mutates, smoke)​

material.add_function_input (risk 2, mutates, smoke)​

material.add_function_output (risk 2, mutates, smoke)​

material.add_function_to_library (risk 2, mutates, smoke)​

material.add_if (risk 2, mutates, smoke)​

material.add_landscape_coords (risk 2, mutates, smoke)​

material.add_landscape_layer_blend (risk 2, mutates, smoke)​

material.add_landscape_layer_sample (risk 2, mutates, smoke)​

material.add_landscape_layer_switch (risk 2, mutates, smoke)​

material.add_landscape_layer_weight (risk 2, mutates, smoke)​

material.add_layer (risk 2, mutates, UE 5.0+, smoke)​

material.add_material_attribute_layers_node (risk 2, mutates, UE 5.0+, smoke)​

material.add_material_attributes_node (risk 2, mutates, smoke)​

material.add_math (risk 2, mutates, smoke)​

material.add_named_reroute (risk 2, mutates, UE 5.0+, smoke)​

material.add_named_reroute_usage (risk 2, mutates, UE 5.0+, smoke)​

material.add_node (risk 2, mutates, smoke)​

material.add_noise (risk 2, mutates, smoke)​

material.add_object_orientation (risk 2, mutates, smoke)​

material.add_object_position (risk 2, mutates, smoke)​

material.add_object_scale (risk 2, mutates, smoke)​

material.add_panner (risk 2, mutates, smoke)​

material.add_particle_color (risk 2, mutates, smoke)​

material.add_particle_macro_uv (risk 2, mutates, smoke)​

material.add_particle_position_ws (risk 2, mutates, smoke)​

material.add_particle_radius (risk 2, mutates, smoke)​

material.add_particle_subuv (risk 2, mutates, smoke)​

material.add_per_instance_custom_data (risk 2, mutates, smoke)​

material.add_per_instance_fade_amount (risk 2, mutates, smoke)​

material.add_per_instance_random (risk 2, mutates, smoke)​

material.add_pixel_depth (risk 2, mutates, smoke)​

material.add_pixel_normal_ws (risk 2, mutates, smoke)​

material.add_previous_frame_switch (risk 2, mutates, smoke)​

material.add_quality_switch (risk 2, mutates, smoke)​

material.add_ray_tracing_quality_switch (risk 2, mutates, smoke)​

material.add_reflection_vector (risk 2, mutates, smoke)​

material.add_reroute (risk 2, mutates, smoke)​

material.add_rotator (risk 2, mutates, smoke)​

material.add_runtime_virtual_texture_sample (risk 2, mutates, smoke)​

material.add_scalar_parameter (risk 2, mutates, smoke)​

material.add_scene_color (risk 2, mutates, smoke)​

material.add_scene_depth (risk 2, mutates, smoke)​

material.add_scene_texture (risk 2, mutates, smoke)​

material.add_screen_position (risk 2, mutates, smoke)​

Guide

Class map

Start here

Recipe workflow (fastest path)

Graph workflow

Compiling

Instances

Functions and the library

Layers (UE 5.0+)

Gotchas

Tools

`material.add_actor_position` (risk 2, mutates, smoke)

`material.add_blackbody` (risk 2, mutates, smoke)

`material.add_bump_offset` (risk 2, mutates, smoke)

`material.add_camera_position` (risk 2, mutates, smoke)

`material.add_camera_vector` (risk 2, mutates, smoke)

`material.add_collection_parameter` (risk 2, mutates)

`material.add_comment` (risk 2, mutates, smoke)

`material.add_comment_around` (risk 2, mutates, smoke)

`material.add_component_mask` (risk 2, mutates, smoke)

`material.add_constant` (risk 2, mutates, smoke)

`material.add_constant2` (risk 2, mutates, smoke)

`material.add_constant3` (risk 2, mutates, smoke)

`material.add_constant4` (risk 2, mutates, smoke)

`material.add_curve_atlas_row_parameter` (risk 2, mutates, smoke)

`material.add_custom` (risk 2, mutates, smoke)

`material.add_ddx` (risk 2, mutates, smoke)

`material.add_ddy` (risk 2, mutates, smoke)

`material.add_depth_fade` (risk 2, mutates, smoke)

`material.add_depth_of_field_function` (risk 2, mutates, smoke)

`material.add_desaturation` (risk 2, mutates, smoke)

`material.add_distance_to_nearest_surface` (risk 2, mutates, smoke)

`material.add_dynamic_parameter` (risk 2, mutates, smoke)

`material.add_eye_adaptation` (risk 2, mutates, smoke)

`material.add_feature_level_switch` (risk 2, mutates, smoke)

`material.add_fresnel` (risk 2, mutates, smoke)

`material.add_function_call` (risk 2, mutates, smoke)

`material.add_function_input` (risk 2, mutates, smoke)

`material.add_function_output` (risk 2, mutates, smoke)

`material.add_function_to_library` (risk 2, mutates, smoke)

`material.add_if` (risk 2, mutates, smoke)

`material.add_landscape_coords` (risk 2, mutates, smoke)

`material.add_landscape_layer_blend` (risk 2, mutates, smoke)

`material.add_landscape_layer_sample` (risk 2, mutates, smoke)

`material.add_landscape_layer_switch` (risk 2, mutates, smoke)

`material.add_landscape_layer_weight` (risk 2, mutates, smoke)

`material.add_layer` (risk 2, mutates, UE 5.0+, smoke)

`material.add_material_attribute_layers_node` (risk 2, mutates, UE 5.0+, smoke)

`material.add_material_attributes_node` (risk 2, mutates, smoke)

`material.add_math` (risk 2, mutates, smoke)

`material.add_named_reroute` (risk 2, mutates, UE 5.0+, smoke)

`material.add_named_reroute_usage` (risk 2, mutates, UE 5.0+, smoke)

`material.add_node` (risk 2, mutates, smoke)

`material.add_noise` (risk 2, mutates, smoke)

`material.add_object_orientation` (risk 2, mutates, smoke)

`material.add_object_position` (risk 2, mutates, smoke)

`material.add_object_scale` (risk 2, mutates, smoke)

`material.add_panner` (risk 2, mutates, smoke)

`material.add_particle_color` (risk 2, mutates, smoke)

`material.add_particle_macro_uv` (risk 2, mutates, smoke)

`material.add_particle_position_ws` (risk 2, mutates, smoke)

`material.add_particle_radius` (risk 2, mutates, smoke)

`material.add_particle_subuv` (risk 2, mutates, smoke)

`material.add_per_instance_custom_data` (risk 2, mutates, smoke)

`material.add_per_instance_fade_amount` (risk 2, mutates, smoke)

`material.add_per_instance_random` (risk 2, mutates, smoke)

`material.add_pixel_depth` (risk 2, mutates, smoke)

`material.add_pixel_normal_ws` (risk 2, mutates, smoke)

`material.add_previous_frame_switch` (risk 2, mutates, smoke)

`material.add_quality_switch` (risk 2, mutates, smoke)

`material.add_ray_tracing_quality_switch` (risk 2, mutates, smoke)

`material.add_reflection_vector` (risk 2, mutates, smoke)

`material.add_reroute` (risk 2, mutates, smoke)

`material.add_rotator` (risk 2, mutates, smoke)

`material.add_runtime_virtual_texture_sample` (risk 2, mutates, smoke)

`material.add_scalar_parameter` (risk 2, mutates, smoke)

`material.add_scene_color` (risk 2, mutates, smoke)

`material.add_scene_depth` (risk 2, mutates, smoke)

`material.add_scene_texture` (risk 2, mutates, smoke)

`material.add_screen_position` (risk 2, mutates, smoke)