Abstract : In this paper we present a ray tracing based method for accelerated global illumination computation in scenes with low-frequency glossy BRDFs. The method is based on sparse sampling, caching, and interpolating radiance on glossy surfaces. In particular we extend the irradiance caching scheme of \cite{ward88ray} to cache and interpolate directional incoming radiance instead of irradiance. The incoming radiance at a point is represented by a vector of coefficients with respect to a spherical or hemispherical basis. The surfaces suitable for interpolation are selected automatically according to the glossiness of their BRDF. We also propose a novel method for computing translational radiance gradient at a point.
https://hal.inria.fr/inria-00070734
Contributor : Rapport de Recherche Inria
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Submitted on : Friday, May 19, 2006 - 9:27:43 PM
Last modification on : Friday, November 16, 2018 - 1:22:22 AM
Long-term archiving on: Tuesday, February 22, 2011 - 11:49:16 AM
