Title

Radiance Caching For Efficient Global Illumination Computation

Keywords

Directional distribution; Global illumination; Hemispherical harmonics; Ray tracing; Spherical harmonics

Abstract

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.

Publication Date

9-1-2005

Publication Title

IEEE Transactions on Visualization and Computer Graphics

Volume

11

Issue

5

Number of Pages

550-561

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TVCG.2005.83

Socpus ID

25644432068 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/25644432068

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