A Practical Analytic Single Scattering Model for Real Time Rendering

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A Practical Analytic Single Scattering Model for
Real Time Rendering
Bo Sun Columbia
University Ravi Ramamoorthi Columbia
University Srinivasa Narasimhan Carnegie
Mellon University Shree Nayar
Columbia University
Sponsors ONR, NSF
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Scattering in Participating Media
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Scattering in Participating Media
Loss of contrast
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Scattering in Participating Media
Dimming and blur
Loss of contrast
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Scattering in Participating Media
Glows
Dimming and blur
Lost of contrast
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Light Transport in Clear Day
Point Source
Viewer
Surface Point
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Light Transport in Scattering Media
Point Source
Viewer
Surface Point
Clear Day
Foggy Day
Clear Day
Foggy Day
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Complexity of Rendering Scattering Media
Objects
Virtual Viewpoint
Virtual Screen
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Complexity of Rendering Scattering Media
Objects
Virtual Viewpoint
Virtual Screen
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Complexity of Rendering Scattering Media
Objects
Virtual Viewpoint
Virtual Screen
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Complexity of Rendering Scattering Media
Objects
Virtual Viewpoint
Virtual Screen
640 x 480 (image) x 4 (lights) x 50 (steps)
100 ( directions ) x 50 (steps) x 30
(intersect) ?
1.9 Trillion Calculations 3.0 GHz
CPU?
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Previous Work

• Monte Carlo Ray Tracing Methods
• Kajiya and Herzen 1984, Max et al. 1994