SetScalarParameterValue — set a float parameter on a dynamic material

ParameterName must match the parameter name in the Material exactly (case-sensitive).

SetScalarParameterValue on dynamic material — change float material parameter

UMaterialInstanceDynamic method. Parameter name must match material graph.

Event Dispatcher binding has wrong parameter types

Why: You're binding a function to an Event Dispatcher (Delegate), but the function's parameters don't match the dispatcher's expected signature '{expected}'. You passed '{got}'. Fix: Either: (a) change your function's input parameter types to match the dispatcher (open the function → My Blueprint → Inputs section → match types one-by-one), or (b) bind a DIFFERENT function whose signature already matches. The Details panel of the Bind Event node shows the expected signature.

Create dynamic material and animate a parameter at runtime

Pattern: EventBeginPlay → GetMesh → CreateDynamicMaterialInstance(ElementIndex=0) → SetVariable(DynMat=ReturnValue). Then on Tick or timer: SetScalarParameterValue(ParameterName='Opacity', Value=SinWave). Or for color: SetVectorParameterValue(ParameterName='Color', Value=MakeLinearColor). Key: CreateDynamicMaterialInstance is called on the COMPONENT (GetMesh), not the actor. Must store the result before using Set*ParameterValue. ParameterName MUST match the name in the Material asset exactly.

SetVectorParameterValue — set a color/vector parameter on a dynamic material

SetVectorParameterValue on dynamic material — change vector/color material parameter

UMaterialInstanceDynamic method. Used for color changes (BaseColor, EmissiveColor).

SetTextureParameterValue on dynamic material — change texture parameter at runtime

Blend Space

Blends 1-2 input parameters (e.g. speed × direction) across a 2D space of animations. Used for locomotion.

Material Instance

A lightweight override of a Material's parameters (color, scalar). Far cheaper than creating new Materials.

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