SIGGRAPH 2012 presentation slides
SIGGRAPH 2012 presentation slides
SIGGRAPH 2012 presentation slides
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The Preetham Model<br />
• De facto standard analytic skydome model<br />
• Simple closed form formulas<br />
• Outputs tristimulus data, convertible to spectral<br />
• Perez formula, fitted to the outputs of Nishita model<br />
• Fitting results publicly available<br />
luma distribution parameters<br />
B/cos θ D 2<br />
<br />
F( θ, γ) = 1+Ae 1+ Ce γ + Ecos<br />
γ<br />
solar angle<br />
zenith angle
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