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  3. DefaultUserData

DefaultUserData

Each geometry copy can receive a user-provided integer, which can be used to retrieve extra shader parameters or customize appearance.

API > API/Runtime > API/Runtime/RHI > API/Runtime/RHI/FRayTracingGeometryInstance

Syntax

uint32 DefaultUserData

Remarks

Each geometry copy can receive a user-provided integer, which can be used to retrieve extra shader parameters or customize appearance. This data can be retrieved using GetInstanceUserData() in closest/any hit shaders. If UserData view is empty, then DefaultUserData value will be used for all instances. If UserData view is used, then it must have the same number of entries as NumInstances.

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