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

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