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.
>
> Use interpolate 2
> Gives you a nice smooth, curvy, interpolation.

Thanks for the suggestion, Alain. It does look better, but it needs a much
higher max_gradient. And I noticed some strange artifacts when rendering a
simple cubical frame with interpolate 2, even though all the outer voxels in my
cube df3 are supposed to be outside the surface.

FWIW, the metallic Mandelbulb I posted was done using a mesh produced by
Marching Cubes.

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