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Mapping Houdini to RenderMan Primvar

When the primvar primitive variable is already available in Houdini such as from an alembic file, we can add Attribute Rename  to map it to RenderMan primvar.


We then specify the variable name on mappng from the Houdini side and the variable name on the RenderMan side under RiName to RiName (the primvar name)  as well as its RiType (the primvar type).


Inside the RIS Network, we create a PxrPrimvar to read this primvar.