Microfacet Models for Refraction through Rough Surfaces
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Date
2007
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
Microfacet models have proven very successful for modeling light reflection from rough surfaces. In this paper we review microfacet theory and demonstrate how it can be extended to simulate transmission through rough surfaces such as etched glass. We compare the resulting transmission model to measured data from several real surfaces and discuss appropriate choices for the microfacet distribution and shadowing-masking functions. Since rendering transmission through media requires tracking light that crosses at least two interfaces, good importance sampling is a practical necessity. Therefore, we also describe efficient schemes for sampling the microfacet models and the corresponding probability density functions.
Description
@inproceedings{:10.2312/EGWR/EGSR07/195-206,
booktitle = {Rendering Techniques},
editor = {Jan Kautz and Sumanta Pattanaik},
title = {{Microfacet Models for Refraction through Rough Surfaces}},
author = {Walter, Bruce and Marschner, Stephen R. and Li, Hongsong and Torrance, Kenneth E.},
year = {2007},
publisher = {The Eurographics Association},
ISSN = {1727-3463},
ISBN = {978-3-905673-52-4},
DOI = {/10.2312/EGWR/EGSR07/195-206}
}