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25 Pages

General_BSDFs_BSSDFs

Course: ECS 298, Fall 2008
School: UC Davis
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Word Count: 1245

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General Rendering BSDFs and BSSDFs Randy Rauwendaal BSDFs Bidirectional Scattering Distribution Function Gives a mathematical description of the way that light is scattered by a surface Is a generalization of a BRDF and a BTDF The Bidirectional Scattering Distribution Function The BSDF is a mathematical description of the light-scattering properties of a surface Let Lo(o) denote the radiance leaving x in...

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General Rendering BSDFs and BSSDFs Randy Rauwendaal BSDFs Bidirectional Scattering Distribution Function Gives a mathematical description of the way that light is scattered by a surface Is a generalization of a BRDF and a BTDF The Bidirectional Scattering Distribution Function The BSDF is a mathematical description of the light-scattering properties of a surface Let Lo(o) denote the radiance leaving x in direction o The light strikes the surfaces and generates an irradiance It can be observed experimentally that as dE(i) is increased there is a proportional increase in the observed radiance dLo(o) The BSDF is now defined to be this constant of proportionality The Scattering Equation By integrating the relationship Over all directions, we can now predict Lo(o) This is summarized by the...
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