Alain <aze### [at] qwertyorg> wrote:

> >> If you want to make it glass or metallic, you need to change a few
> >> things for the DF3 way:
> >> Outside value: 16
> >> Inside value: 200
> >> This is to get rid of the overshot artefacts you can get with the
> >> interpolation. Interpolate 2 realy don't work well when you have sharp
> >> jumps to zero and 255.

>
> If the values reach zero or the highest possible value (255 for 8 bits),
>   you get overshots, and those results in warping around the resulting
> values from your density_map. If you go to zero, you get areas that will
> eroneously use the entry for 1 on the density map. If you go to 255, you
> get areas that will use the values for zero, or close to zero.
>
> That's why I told you to restrict the range of values used.

I understand, Alain, and I have restricted the values: my df3 test files only
use 16 & 200 (I used tr to translate my existing files). But I still get these
artifacts. I didn't bother saving an image, but I'll generate a new one, if
you'd like to see for yourself.

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