Realistic Rock with Lichen Shader in Renderman

The two demo scenes produced with the shader.
 “Dusk on Mars”(Left) & “Tea in the Forest” (Right)

 

We had to write a RSL (Renderman Shading Language) shader for one of our assignments. The pictures you see are two simple scenes constructed in a RIB file, using the shader on different objects with different parameters, so that all it’s features can be demonstrated.