Occasionally, if the geometry is very detailed and/or displaced, you may need to use smaller values of micropolygonlength. However, note that smaller micropolygons will results in a larger memory consumption and slower render times.
You can find more about settings on geometry by looking at the Master Attributes or "Primvars" offered by RenderMan.
RenderMan includes examples RIB files and shading plugins demonstrating its capabilities. These examples can be found in
/lib/examples/RIS/scenes directory of your RenderMan Pro Server installation.