Real‐Time Linear BRDF MIP‐Mapping

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 m...

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Bibliographic Details
Published inComputer graphics forum Vol. 36; no. 4; pp. 27 - 34
Main Authors Xu, Chao, Wang, Rui, Zhao, Shuang, Bao, Hujun
Format Journal Article
LanguageEnglish
Published Oxford Blackwell Publishing Ltd 01.07.2017
Subjects
Approximation
Categories and Subject Descriptors (according to ACM CCS)
I.3.7 [Computer Graphics]: Three‐Dimensional Graphics and Realism—Color, shading, shadowing, and texture
Lobes
Mapping
Real time
Reflectance
Stores
Online AccessGet full text
ISSN0167-7055
1467-8659
DOI10.1111/cgf.13221

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Summary: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.
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.13221