News about faster hair rendering method

General discussion about the development of the open source Blender

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dgebel
Posts: 30
Joined: Mon Mar 17, 2003 7:20 pm
Location: Ontario, Canada

News about faster hair rendering method

Post by dgebel »

Summary at http://blogs.zdnet.com/emergingtech/?p=301
Marschner and Moon's algorithm begins by tracing rays from the light source into the hair, using some approximations of the scattering and producing a map of where photons of light can be found throughout the volume of hair. Then it traces a ray from each pixel of the image to a point in the hair and looks at the map to decide how much light should be available there.

The result, in a test rendering of a swatch of blond hair, appears almost identical to a rendering by the laborious path-tracing method. Path tracing for the test required 60 hours of computation, while the new method took only 2.5 hours, the researchers report.
I don't think a new node will help with this, but maybe there's something the experts could used to help speed up rendering.

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