A simple layered RGB BRDF model

Authors:
Xavier Granier;Wolfgang Heidrich
Affiliations:
Department of Computer Science, IMAGER, University of British Columbia, 201-2366 Main Mall, Vancouver, BC, Canada V6T 1Z4;Department of Computer Science, IMAGER, University of British Columbia, 201-2366 Main Mall, Vancouver, BC, Canada V6T 1Z4
Venue:
Graphical Models - Special issue on Pacific graphics 2002
Year:
2003

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Abstract

Many natural objects, and in particular layered materials, have non-linear reflection behavior along the wavelengths. An accurate representation of phenomena such as interference and color dispersion generally requires a fine spectral representation of light instead of the commonly used RGB components. In this article, we introduce and experiment with a general approach to create similar and convincing effects, with a simple RGB BRDF model. We present a model for both specular and diffuse reflection, and implement them into software and hard-ware accelerated rendering process.