Hall wrote:
> using pov-ray 3.6.1 for windows on windows XP...
> Should I be seeing the banding produced in this minimal scene file?
> (Is this a limitation of POV's precision, or a bug?  banding is stronger in 
> original bmp of picture)

Fredrick's got it right. The banding is natural for this kind of image 
at 24-bit precision, as you effectively only have 8 bits of pure gray to 
work with.

Outputting at 48 bits and then dithering down in another app (probably 
GIMP or Photoshop) should help reduce the banding; it will also make 
your image a bit grainy, but it shouldn't be visibly so. Alternately, 
introducing more noise or color to the scene, or adding noise in 
post-processing, should eliminate the banding.

-Xplo

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