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Real‐time homogenous translucent material editing
Author(s) -
Xu Kun,
Gao Yue,
Li Yong,
Ju Tao,
Hu ShiMin
Publication year - 2007
Publication title -
computer graphics forum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 120
eISSN - 1467-8659
pISSN - 0167-7055
DOI - 10.1111/j.1467-8659.2007.01077.x
Subject(s) - radiance , computer science , rendering (computer graphics) , piecewise , spherical harmonics , algorithm , basis function , scattering , global illumination , frame rate , exponential function , attenuation , wavelet , basis (linear algebra) , computer graphics (images) , computer vision , optics , mathematics , mathematical analysis , geometry , physics
This paper presents a novel method for real‐time homogenous translucent material editing under fixed illumination. We consider the complete analytic BSSRDF model proposed by Jensen et al. [ JMLH01 ], including both multiple scattering and single scattering. Our method allows the user to adjust the analytic parameters of BSSRDF and provides high‐quality, real‐time rendering feedback. Inspired by recently developed Precomputed Radiance Transfer (PRT) techniques, we approximate both the multiple scattering diffuse reflectance function and the single scattering exponential attenuation function in the analytic model using basis functions, so that re‐computing the outgoing radiance at each vertex as parameters change reduces to simple dot products. In addition, using a non‐uniform piecewise polynomial basis, we are able to achieve smaller approximation error than using bases adopted in previous PRT‐based works, such as spherical harmonics and wavelets. Using hardware acceleration, we demonstrate that our system generates images comparable to [ JMLH01 ]at real‐time frame‐rates.