Radiance Caching for Efficient Global Illumination (2005)
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| Venue: | IEEE Transactions on Visualization and Computer Graphics |
| Citations: | 6 - 0 self |
BibTeX
@INPROCEEDINGS{Krivanek05radiancecaching,
author = {Jaroslav Krivanek and Pascal Gautron and Sumanta Pattanaik and Kadi Bouatouch},
title = {Radiance Caching for Efficient Global Illumination},
booktitle = {IEEE Transactions on Visualization and Computer Graphics},
year = {2005},
pages = {550--561}
}
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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 proposed by Ward et al. [1] 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 roughness of their BRDF. We also propose a novel method for computing translational radiance gradient at a point.







