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A Global Illumination Solution for General Reflectance Distributions

François X. Sillion 1 James Arvo Stephen Westin Donald P. Greenberg 
1 iMAGIS - Models, Algorithms and Geometry for Computer Generated Image Graphics
GRAVIR - IMAG - Laboratoire d'informatique GRAphique, VIsion et Robotique de Grenoble, Inria Grenoble - Rhône-Alpes
Abstract : A general light transfer simulation algorithm for environments composed of materials with arbitrary reflectance functions is presented. This algorithm removes the previous practical restriction to ideal specular and/or ideal diffuse environments, and supports complex physically based reflectance distributions. This is accomplished by extending previous two-pass ray-casting radiosity approaches to handle non-uniform intensity distributions, and resolving all possible energy transfers between sample points. An implementation is described based on a spherical harmonic decomposition for encoding both bidirectional reflectance distribution functions for materials, and directional intensity distributions for illuminated surfaces. The method compares favorably with experimental measurements.
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  • HAL Id : inria-00510145, version 1



François X. Sillion, James Arvo, Stephen Westin, Donald P. Greenberg. A Global Illumination Solution for General Reflectance Distributions. SIGGRAPH'91 conference proceedings, 1991, Las Vegas, United States. pp.187-196. ⟨inria-00510145⟩



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