A Global Illumination Solution for General Reflectance DistributionsReport as inadecuate

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1 iMAGIS - Models, Algorithms and Geometry for Computer Generated Image Graphics GRAVIR - IMAG - Graphisme, Vision et Robotique, 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.

Keywords : global illumination BRDF specular reflection directional-diffuse progressive radiosity spherical harmonics

Author: François X. Sillion - James Arvo Stephen Westin Donald P. Greenberg

Source: https://hal.archives-ouvertes.fr/


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