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This paper presents a method for designing the illumination in an environment using optimization techniques applied to a radiosity based image synthesis system. An optimization of lighting parameters is performed based on user specified constraints and objectives for the illumination of the environment. The Radioptimization system solves for the "best" possible settings for: light source emissivities, element reflectivities, and spotlight directionality parameters so that the design goals, such as to minimize energy or to give the room an impression of "privacy", are met. The system absorbs much of the burden for searching the design space allowing the user to focus on the goals of the illumination design rather than the intricate details of a complete lighting specification.
Kawai et al. (Wed,) studied this question.