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To add a light, select one of light tools such as Dome Image Removed from the RenderMan Shelf or the RenderMan Menu which automatically creates a Pxr light OBJ.  See Lighting for more information.

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To add a material, we need to first create a RIS Network.  Note that RIS material is not a SHOP but It it is a VOP inside a RIS Network.  A RIS Network is just a container for RIS VOPs.  It is required for Houdini to work with RIS materials.   For simplicity, we recommend creating only one instance of RIS Network and include all your RIS VOP nodes in it.  New in RenderMan 22 - a material is represented by a PxrCollect VOP with a BxDF VOP input. To add a material such as PxrSurface, you can select the Surface tool Image Removed from the add a PxrSurface from the RenderMan Shelf  , which automatically creates a PxrCollect, or select another BxDF from the RenderMan Menu to wire into a collect VOP. These tools also automatically create a RIS Network if it does not exist and a PxrSurface as well as the selected VOP. 

Assigning Material

To assign the material to your object, simply drag the Pxr PxrCollect VOP you just created to the Material parameter of your object.

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To render, add a RenderMan RIS ROP Image Removed from the RenderMan Shelf.  . This tool also creates a RIS Network and sets the integrator to PxrPathTracer. Press the Render to MPlay button to see your render interactiveinteractively in the Image Tool.    See Rendering for more information.