Dr. Paul Debevec is the director of the University of Southern California's Institute for Creative Technologies. On this page of his Web site, he presents some of his recent work that involves simulating light sources for a virtual environment. This is done with a sphere of different colored lights that can produce lighting effects representative of the virtual conditions. His most recent addition is a paper presented at the SIGGRAPH 2002 computer graphics conference held in July. A video demonstration of the system, also from the conference, accompanies the paper. There are other clips and pictures that show how the system provides accurate lighting effects for an actor in a virtual environment.