Real-Time Linear BRDF MIP-Mapping
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Date
2017
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Publisher
The Eurographics Association and John Wiley & Sons Ltd.
Abstract
We present a new technique to jointly MIP-map BRDF and normal maps. Starting with generating an instant BRDF map, our technique builds its MIP-mapped versions based on a highly efficient algorithm that interpolates von Mises-Fisher (vMF) distributions. In our BRDF MIP-maps, each pixel stores a vMF mixture approximating the average of all BRDF lobes from the finest level. Our method is capable of jointly MIP-mapping BRDF and normal maps, even with high-frequency variations, at real-time while preserving high-quality reflectance details. Further, it is very fast, easy to implement, and requires no precomputation.
Description
@article{10.1111:cgf.13221,
journal = {Computer Graphics Forum},
title = {{Real-Time Linear BRDF MIP-Mapping}},
author = {Xu, Chao and Wang, Rui and Zhao, Shuang and Bao, Hujun},
year = {2017},
publisher = {The Eurographics Association and John Wiley & Sons Ltd.},
ISSN = {1467-8659},
DOI = {10.1111/cgf.13221}
}