"1Daedalus" <nomail@nomail> wrote:
> Warp <war### [at] tagpovrayorg> wrote:
> > Nathan Kopp <pov### [at] nkoppmailshellcom> wrote:
> > > The bicubic_patch was notorious for always being double-illuminated before
> > > this change was introduced.
> >
> >   I think that mesh was even more notorious for this.
> >
> >   There was a quite good reason, though: It elliminated this problem:
> > http://tag.povray.org/povQandT/SmoothTriangleArtifact/index.html
> >
> >   When the implicit double-illumination was removed (in pov3.5, iirc),
> > this problem immediately surfaced. :P
> >
> > --
> >                                                           - Warp
>
> Thanks for the link, I found the technical discussion illuminating. ;-)
>
> -- 1Daedalus


fyi, for anyone who reads this thread, suggestions to try
"double-illumination" or transparency are off track.  The
double-illumination keyword only applies to surfaces, not solids.
Transparency doesn't work either, it tends to make the objects see-through
rather than transluscent.

-- 1Daedalus

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