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Tek wrote:
> "Samuel Benge" <stb### [at] hotmail com> wrote in message
> news:45eef8a7$1@news.povray.org...
>I figured I should post it anyway.
>
> IMO the problem is it's only blending to the adjacent cell, and it always
> uses pov's cubic curve rather than trying to maintain a smooth gradient.
Yes, I was hoping to control that with a poly_wave n statement after a
cubic_mapped pigment_pattern, but it didn't work out very well. The
cubic wave is still expressed in the same way, only shifted one way or
another.
> If
> I'm understanding correctly Vincent's technique was actually doing cubic
> interpolation, rather than just using cubic_wave (which isn't equivalent)...
>
> Of course I'm saying all this without checking anyone's source code, but
> since it's based on my blended cells I would expect it to create curved
> steps where there should be a smooth gradient, which would cause the problem
> you're seeing.
>
> Wow I explained that really badly!
Maybe so, but I understand why there are steps. I don't like it, but at
least I have the newest version of MegaPOV now. It supports bi-cubic
interpolation for image maps :)
~Sam
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