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API > API/Runtime > API/Runtime/Engine > API/Runtime/Engine/Materials > API/Runtime/Engine/Materials/UMaterialExpressionSubstrateVolu-
Syntax
UPROPERTY ()
FExpressionInput AmbientOcclusion
Remarks
Ambient occlusion: 1 means no occlusion while 0 means fully occluded. (type = float, unit = unitless, default = 1)