In article <41ab944a@news.povray.org>, Warp <war### [at] tagpovrayorg> 
wrote:

> > Just have your lenssystem project the photons on a "film"-plane and use 
> > the camera to render an image of that projection.
> 
>   Photons do not reflect diffusely from objects and thus what you suggest
> is not possible.

Heh...you could put a fine scale normal on all objects and use specular 
reflection. However, this would be obscenely slow.

The best way would be to patch POV to sample the entire lens area for 
each pixel in the image plane. Still slow, but far faster than forward 
raytracing.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: <chr### [at] tagpovrayorg>
http://tag.povray.org/

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