Blend Space

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

LinearColorLerp — blend between two colors by Alpha

SetViewTargetWithBlend — smoothly blend camera to a new view target

BlendTime in seconds. BlendFunc: VTBlend_Linear, VTBlend_Cubic, VTBlend_EaseIn, VTBlend_EaseOut. Call on the PlayerController.

Lerp

Linear interpolation — returns A when Alpha=0, B when Alpha=1, and a smooth blend in between. Pair with Timeline for animation.

CreateDynamicMaterialInstance — create runtime modifiable material

UPrimitiveComponent method. Store result in variable and reuse. Create once in BeginPlay.

string

string

CreateDynamicMaterialInstance — create a runtime-editable material copy

Must call this before SetScalarParameterValue/SetVectorParameterValue. Store the result in a variable for reuse.

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

Overlap

Two collision shapes occupying the same space without blocking. Use for triggers (volume, pickup).

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.