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A new approach to lighting the live performance of an actor and compositing him or her into a real or virtual set has been developed by a team led by Paul Debevec at the University of Southern California's Institute for Creative Technologies. The process, designed to precisely replicate the illumination of an actor in virtually any desired environment, entails having the person perform inside a so-called Light Stage, a large sphere containing 156 inward-pointing, red-green-blue light-emitting diodes, each ...