Looks useful as a wood pigment.

Lance Birch wrote:

> How about...
>
> F=(X^2+Y^2+Z^2+2*Y-1)*((X^2+Y^2+Z^2-2*Y-1)^2-8*Z^2)+16*X*Z*(X^2+Y^2+Z^2-2*Y-
> 1)

--
Samuel Benge

E-Mail: STB### [at] aolcom
Website: http://members.aol.com/stbenge

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