Abstract
Optically rough surfaces reflect light not just at a single direction as mirror-like smooth surfaces but at infinitely many directions. The reflected radiance of very rough surfaces, which are called diffuse surfaces, is similar for all viewing directions. Smoother, glossy surfaces still reflect in all possible directions but the radiance is higher in the vicinity of the ideal reflection direction. At a diffuse or glossy surface, a light path may be continued at infinitely many directions (Figure 7.1), from which a high enough number of sample paths should be computed and their contributions should be added.
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© 2008 Springer Nature Switzerland AG
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Szirmay-Kalos, L., Szécsi, L., Sbert, M. (2008). Diffuse and Glossy Indirect Illumination. In: GPU-Based Techniques for Global Illumination Effects. Synthesis Lectures on Computer Graphics and Animation. Springer, Cham. https://doi.org/10.1007/978-3-031-79525-1_7
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DOI: https://doi.org/10.1007/978-3-031-79525-1_7
Publisher Name: Springer, Cham
Print ISBN: 978-3-031-79524-4
Online ISBN: 978-3-031-79525-1
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