Christopher James Huff <cja### [at] earthlinknet> wrote:
> 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.

  I wonder if this would already be possible with POV-Ray's radiosity...
After all, it does exactly that: For each intersection point it shoots
rays to all directions to see what is there... (give or take some sample
reusing, but setting reusing to minimum it just might do the trick).

-- 
plane{-x+y,-1pigment{bozo color_map{[0rgb x][1rgb x+y]}turbulence 1}}
sphere{0,2pigment{rgbt 1}interior{media{emission 1density{spherical
density_map{[0rgb 0][.5rgb<1,.5>][1rgb 1]}turbulence.9}}}scale
<1,1,3>hollow}text{ttf"timrom""Warp".1,0translate<-1,-.1,2>}//  - Warp -

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