In this paper, we present a ray tracing-based method (or 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 hemispherical or spherical 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. © 2005 IEEE.
CITATION STYLE
Křivánek, J., Gautron, P., Pattanaik, S., & Bouatouch, K. (2005). Radiance caching for efficient global illumination computation. IEEE Transactions on Visualization and Computer Graphics, 11(5), 550–561. https://doi.org/10.1109/TVCG.2005.83
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