"Florian Siegmund" <flo### [at] gmxat> wrote:
> *absorbing media* are the magic words. Although I'm not sure if it uses a
> physically correct distance formula, the material looks better now.

I like absorbing media because it makes more intuitive sense to me how it
relates to physical reality.  (I have trouble making sense of fade_color.)

The problems are that absorbing media are slower and (ironically to your
experience) I find them prone to artifacts.

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