Virtual spherical lights for many-light rendering of glossy scenes
- 1 December 2009
- journal article
- research article
- Published by Association for Computing Machinery (ACM) in ACM Transactions on Graphics
- Vol. 28 (5), 1-6
- https://doi.org/10.1145/1618452.1618489
Abstract
In this paper, we aim to lift the accuracy limitations of many-light algorithms by introducing a new light type, the virtual spherical light (VSL). The illumination contribution of a VSL is computed over a non-zero solid angle, thus eliminating the illumination spikes that virtual point lights used in traditional many-light methods are notorious for. The VSL enables application of many-light approaches in scenes with glossy materials and complex illumination that could previously be rendered only by much slower algorithms. By combining VSLs with the matrix row-column sampling algorithm, we achieve high-quality images in one to four minutes, even in scenes where path tracing or photon mapping take hours to converge.Keywords
Funding Information
- Division of Computer and Network Systems (CAREER 0644175CPA 0811680CNS 0403340)
- Division of Computing and Communication Foundations (CAREER 0644175CPA 0811680CNS 0403340)
- Seventh Framework Programme (PIOF-GA-2008-221716)
- National Science Foundation (CAREER 0644175CPA 0811680CNS 0403340)
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