Anders Hast
Creative Media Lab, University of Gävle, Sweden
Daniel Wesslén
University of Gävle, Sweden
Stefan Seipel
University of Gävle, Sweden
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Published in: The Annual SIGRAD Conference. Special Theme - Environmental Visualization
Linköping Electronic Conference Proceedings 13:14, p. 57-58
Published: 2004-11-24
ISBN:
ISSN: 1650-3686 (print), (online)
Cloth; hair; brushed metal; and other surfaces with small; regular surface features exhibit anisotropic reflectance properties for which common isotropic shading methods are not suited. Shading of such materials is often implemented by computing the normal giving the maximum light contribution instead of solving the integral that is the sum of all reflected light. In this paper we show that this integral can be simplified if the direction to the viewer and fibre geometry is not taken into account. Still; this will give a more accurate result than the very rough simplification of using the maximum contribution. This computation is simple for diffuse light. However; the specular light still needs some more elaboration to work.
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