Implementing RenderMan - Practice, Problems and Enhancements. - Philipp Slusallek; Thomas Pflaum; Hans-Peter Seidel (Comput. Graph. Forum, 1994)

Using Procedural RenderMan Shaders for Global Illumination. - Philipp Slusallek; Thomas Pflaum; Hans-Peter Seidel (Comput. Graph. Forum, 1995)