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Unreal Engine C++ API Reference > Runtime > Engine > Materials > UMaterialExpressionVolumetricAdvancedMaterialOutput
Syntax
UPROPERTY (
Meta=(RequiredInput="false", ToolTip="Parameter 'g' input to the phase function describing how much forward(g<0) or backward (g>0) light scatter around. Valid range is [-1,1]. Defaults to ConstPhaseG from properties panel if not specified. Evaluated per sample if EvaluatePhaseOncePerSample is true."))
FExpressionInput PhaseG
Remarks
Parameter 'g' input to the phase function describing how much forward(g<0) or backward (g>0) light scatter around. Valid range is [-1,1].