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API > API/Runtime > API/Runtime/Engine > API/Runtime/Engine/Materials > API/Runtime/Engine/Materials/UMaterialExpressionVolumetricAdv-_1
Syntax
UPROPERTY (EditAnywhere, Category="Phase")
bool PerSamplePhaseEvaluation
Remarks
Set this to true to force the phase function to be evaluated per sample, instead once per pixel (globally). Per sample evaluation is slower.