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GRAPHICSINTERFACE
2000

Approximation of Glossy Reflection with Prefiltered Environment Maps

14 years 7 days ago
Approximation of Glossy Reflection with Prefiltered Environment Maps
A method is presented that can render glossy reflections with arbitrary isotropic bidirectional reflectance distribution functions (BRDFs) at interactive rates using texture mapping. This method is based on the well-known environment map technique for specular reflections. Our approach uses a single- or multilobe representation of bidirectional reflectance distribution functions, where the shape of each radially symmetric lobe is also a function of view elevation. This approximate representation can be computed efficiently using local greedy fitting techniques. Each lobe is used to filter specular environment maps during a preprocessing step, resulting in a three-dimensional environment map. For many BRDFs, simplifications using lower-dimensional approximations, coarse sampling with respect to view elevation, and small numbers of lobes can still result in a convincing approximation to the true surface reflectance. Key words: Environment map, glossy reflection, texture mapping, bidirec...
Jan Kautz, Michael D. McCool
Added 01 Nov 2010
Updated 01 Nov 2010
Type Conference
Year 2000
Where GRAPHICSINTERFACE
Authors Jan Kautz, Michael D. McCool
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