A New Ward BRDF Model with Bounded Albedo
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Date
2010
Authors
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Publisher
The Eurographics Association and Blackwell Publishing Ltd
Abstract
Due to its realistic appearance, computational convenience, and efficient Monte Carlo sampling, Ward s anisotropic BRDF is widely used in computer graphics for modeling specular reflection. Incorporating the criticism that the Ward and the Ward-Duer model do not meet energy balance at grazing angles, we propose a modified BRDF that is energy conserving and preserves Helmholtz reciprocity. The new BRDF is computationally cheap to evaluate, admits efficient importance sampling, and thus sustains the main benefits of the Ward model. We show that the proposed BRDF is better suited for fitting measured reflectance data of a linoleum floor used in a real-world building than the Ward and the Ward-Duer model.
Description
@article{10.1111:j.1467-8659.2010.01735.x,
journal = {Computer Graphics Forum},
title = {{A New Ward BRDF Model with Bounded Albedo}},
author = {Geisler-Moroder, David and Duer, Arne},
year = {2010},
publisher = {The Eurographics Association and Blackwell Publishing Ltd},
ISSN = {1467-8659},
DOI = {10.1111/j.1467-8659.2010.01735.x}
}