Pat Hanrahan is the Canon USA Professor of Computer Science and Electrical Engineering at Stanford University where he teaches computer graphics. His current research involves visualization, image synthesis, and graphics systems and architectures. Before joining Stanford he was a faculty member at Princeton. He has also worked at Pixar where he developed volume rendering software and was the chief architect of the RenderMan(TM) Interface -- a protocol that allows modeling programs to describe scenes to high-quality rendering programs, and he worked on the Renderman software team at Pixar for TIN TOY (1988) and TOY STORY (1995).. Previous to Pixar he directed the 3-D computer graphics group in the Computer Graphics Laboratory at New York Institute of Technology. Professor Hanrahan has received three university teaching awards. He has also received an Academy Award for Science and Technology, the Spirit of America Creativity Award, and the SIGGRAPH Computer Graphics Achievement Award.  Scientific and Engineering Award (Plaque) 1992: For development of "RenderMan" software which produces images used in motion pictures from 3D computer descriptions of shape and appearance. (w. Rob Cook, Ed Catmull, Thomas Porter, Loren Carpenter, Tony Apodaca & Darwyn Peachey)  Technical Achievement Award (Certificate) 2003: For their pioneering research in simulating subsurface scattering of light in translucent materials as presented in their paper "A Practical Model for Subsurface Light Transport." (w. Henrik Wann Jensen and Stephen Marschner) 2 Scientific/Technical Awards