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Radeon ProRender Discussion

Journeyman III

Houdini - unable to map arbitrary primvars to shaders attributes

Hi All,

I'm testing RPR plugin for Houdini / Solaris. I'm really excited to see this product. Thank you for sharing this !

I've a question about varying primvars.

I've been trying to find a way to map an arbitrary attribute (I tried both point and prim attributes) to a primvar and use it to drive a shade parameters.

I succeeded with Karma and MtlX using the node MtlX Geometry Property Value, but I can't seem to find the RPR specific node to import a primvars.

When I try to render the same MtlX network mentioned above with RPR the prim var is not read at all.

I found the node RPR Value Lookup , but this node is locked to specific variables. I'm trying to import an arbitrary one.

On this page ( , under the Rendering Feature I read

  • *NEW* Support for Varying or Vertex primitive variables has been added.

But I can't seem to find a way to get it working, and most probably I'm missing something obvious. 

Can anyone point me in the right direction ?

Thank you in advance


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