Radiance Caching for Efficient Global Illumination Computation

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.
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Submitted on : Friday, May 19, 2006 - 9:27:43 PM
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  • HAL Id : inria-00070734, version 1

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Jaroslav Krivánek, Pascal Gautron, Sumanta Pattanaik, Kadi Bouatouch. Radiance Caching for Efficient Global Illumination Computation. [Research Report] RR-5264, INRIA. 2004, pp.17. ⟨inria-00070734⟩

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