Efficient Lighting   Chair Tomoyuki Nishita University of Tokyo   Direct Illumination With Lazy Visibility Evaluation David Hart Philip Dutré Donald P. Greenberg Cornell University   Computing Exact Shadow Irradiance Using Splines Michael M. Stark Elaine Cohen Richard F. Riesenfeld University of Utah   Tom Lyche University of Oslo   Reflection-Space Image Based Rendering Brian Cabral Marc Olano Phil Nemec SGI   Realistic, Hardware-Accelerated Shading and Lighting Wolfgang Heidrich Hans-Peter Seidel Universität Erlangen   Tracing Ray Differentials Homan Igehy Stanford University