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API > API/Runtime > API/Runtime/Engine > API/Runtime/Engine/Materials > API/Runtime/Engine/Materials/UMaterialExpressionSubstrateSlab-
Syntax
UPROPERTY ()
FExpressionInput GlintUV
Remarks
The parameterization of the surface required to position glints on a surface. Only used when `r.Substrate.Glints=1_. Defaults to (0,0).