Le 06/08/2020 à 04:40, Kima a écrit :
> 
> There are two ways to reduce colour banding in POV-RAY
> 
> 1. 16-bit depth to have a more accurate spectrum of colours.
> 
> 2. Dither to fake the colour gradient.
> 
> Unfortunately, neither of these methods is available if the output format is
> JPG.
> 
> If we output a PNG file with +TH, and then, convert it to JPG, the colour
> banding disappears.
> 
> I wonder why can't we directly save the same effect with JPG output.
> 
> 

You could play with the "Compression" in ini file, to change from the
default 85% quality.

http://wiki.povray.org/content/Reference_Talk:File_Output_Options

Try Compression=100 and see.


About colour bands and other jpeg problem, it is an old story:

https://www.povray.org/documentation/view/3.6.1/169/

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