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Efficient reflectance and visibility approximations for environment map rendering

Green, P; Kautz, J; Durand, F; (2007) Efficient reflectance and visibility approximations for environment map rendering. COMPUTER GRAPHICS FORUM , 26 (3) 495 - 502.

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Abstract

We present a technique for approximating isotropic BRDFs and precomputed self-occlusion that enables accurate and efficient prefiltered environment map rendering. Our approach uses a nonlinear approximation of the BRDF as a weighted sum of isotropic Gaussian functions. Our representation requires a minimal amount of storage, can accurately represent BRDFs of arbitrary, sharpness, and is above all, efficient to render. We precompute visibility, due to self-occlusion and store a low-frequency approximation suitable for gloss), reflections. We demonstrate our method by fitting our representation to measured BRDF data, yielding high visual quality at real-timeframe rates.

Type: Article
Title: Efficient reflectance and visibility approximations for environment map rendering
Location: Prague, CZECH REPUBLIC
UCL classification: UCL > School of BEAMS > Faculty of Engineering Science > Computer Science
URI: http://discovery.ucl.ac.uk/id/eprint/154872
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