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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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.
|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|
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