Does anyone know where I can input the Rman shaders's shading rate in Houdini?

In the Rman ROP, go to Specific tab, “Shadequality Factor”. Note that the value you enter in here is *not* the same as the number that goes into the rib - that's why the friendly popup selector. Punch out samples to see the inverse mapping…

Cheers,

J.C.

Thank you very much JColdrick!
Is it possible for me to have the Rman shaders previewed in SHOP? Even if I am not using PRMAN. (e.g. 3delight)

No, it's not possible to preview Rman shaders.

Cheers!
steven

Also, do you know where I can adjust renderman's bucket size in Houdini?

All this stuff is in the same place - the Specific tab in the output driver…

J.C.

I know that I can use the rmanshader sop to attach renderman shaders in Houdini. But how about renderman's displacement shaders? Is there any sop for renderman displacement?

Thanks!

You should be able to use Shader SOP for Renderman displacement in the SOP level.