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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 ... – PowerPoint PPT presentation

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Title: A Practical Analytic Single Scattering Model for Real Time Rendering


1
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
2
Scattering in Participating Media
3
Scattering in Participating Media
Loss of contrast
4
Scattering in Participating Media
Dimming and blur
Loss of contrast
5
Scattering in Participating Media
Glows
Dimming and blur
Lost of contrast
6
Light Transport in Clear Day
Point Source
Viewer
Surface Point
7
Light Transport in Scattering Media
Point Source
Viewer
Surface Point
Clear Day
Foggy Day
Clear Day
Foggy Day
8
Complexity of Rendering Scattering Media
Objects
Virtual Viewpoint
Virtual Screen
9
Complexity of Rendering Scattering Media
Objects
Virtual Viewpoint
Virtual Screen
10
Complexity of Rendering Scattering Media
Objects
Virtual Viewpoint
Virtual Screen
11
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?
12
Previous Work
  • Monte Carlo Ray Tracing Methods
  • Kajiya and Herzen 1984, Max et al. 1994
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