Well, the point isn't to elliminate the fact that the pattern is *based* on
a grid, it's just to elliminate the 2nd derivative artifact that is most
visible when the function is used as a normal pattern. This definitely does
the trick, though the grid is, of course, still visible, but less visible
and less intrusive.

I'll post a picture as soon as I get this working.

 - Slime
[ http://www.slimeland.com/ ]

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