"Bald Eagle" <cre### [at] netscapenet> wrote:
> "Kenneth" <kdw### [at] gmailcom> wrote:
>
> > Neglecting possible problems with the isosurfaces: I should have mentioned
> > that the artifacts being black means that rad is picking up that black color
> > from somewhere...
>
> Hmmm. Yes, if this is indeed the case, then we may be running into that
> color-vector multiplier thing.  Anything * <0, 0, 0> = <0, 0, 0>.

That's a good and interesting point. In effect: If *large* rad patches are a
blend of colors from various points/objects in the scene-- which I *think* is
the case-- and if one of those patches is pure black, then maybe the entire
'blend' is reduced to black there(?). I have never tested that, but it's worth
an experiment to see what happens.

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