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On Sun, 31 Jul 2005 17:26:22 +0200, Hall <tre### [at] ww-interlink net> 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)
>
> camera { location <-4,4,-4> look_at <0,0,0> right <1,0,0> up <0,1,0> }
> light_source { <1,1,-1> color rgb 1 }
> plane { <0,1,0>, 0 pigment{color rgb 1} }
>
> and result....
The banding results from the limits in the precision of the output format
and the final display device. In a 24-bit colour image, there are only 256
shades of pure gray.
Possible remedies:
- Introduce more colour in the image.
- Output at a higher bit depth (e.g. 16bpp/48bpp png), and use image
manipulation software to dither the image down to 8 bits per colour
channel.
--
FE
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