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 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 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

12-1-2007

Publication Title

ACM SIGGRAPH 2007 Papers - International Conference on Computer Graphics and Interactive Techniques

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

79960166638 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/79960166638

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