SIGGRAPH 2012 presentation slides
SIGGRAPH 2012 presentation slides SIGGRAPH 2012 presentation slides
• outdoor scenes Motivation: Skydome models • prediction of material appearance • architecture, outdoor scenes • alternative: skyboxes
The Preetham Model • De facto standard analytic skydome model • Simple closed form formulas • Outputs tristimulus data, convertible to spectral • Perez formula, fitted to the outputs of Nishita model • Fitting results publicly available luma distribution parameters B/cos θ D 2 F( θ, γ) = 1+Ae 1+ Ce γ + Ecos γ solar angle zenith angle
- Page 1: An Analytic Model for Full Spectral
- Page 5 and 6: Issues With the Preetham Model •
- Page 7 and 8: • spectral (including UV) • lar
- Page 9 and 10: Obtaining Reference Data
- Page 11 and 12: Result: Comparison
- Page 13 and 14: inputs Model flowchart once per sce
- Page 15 and 16: Results
- Page 17 and 18: UV & Fluorescence
- Page 19: Conclusion • Reference implementa
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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