Making Radiance and Irradiance Caching Practical: Adaptive Caching and Neighbor Clamping
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Date
2006
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
Radiance and irradiance caching are efficient global illumination algorithms based on interpolating indirect illumination from a sparse set of cached values. In this paper we propose an adaptive algorithm for guiding spatial density of the cached values in radiance and irradiance caching. The density is adapted to the rate of change of indirect illumination in order to avoid visible interpolation artifacts and produce smooth interpolated illumination. In addition, we discuss some practical problems arising in the implementation of radiance and irradiance caching, and propose techniques for solving those problems. Namely, the neighbor clamping heuristic is proposed as a robust means for detecting small sources of indirect illumination and for dealing with problems caused by ray leaking through small gaps between adjacent polygons.
Description
@inproceedings{:10.2312/EGWR/EGSR06/127-138,
booktitle = {Symposium on Rendering},
editor = {Tomas Akenine-Moeller and Wolfgang Heidrich},
title = {{Making Radiance and Irradiance Caching Practical: Adaptive Caching and Neighbor Clamping}},
author = {Krivánek, Jaroslav and Bouatouch, Kadi and Pattanaik, Sumanta and Zára, Jirí},
year = {2006},
publisher = {The Eurographics Association},
ISSN = {1727-3463},
ISBN = {3-905673-35-5},
DOI = {/10.2312/EGWR/EGSR06/127-138}
}