"Mike Williams" <mik### [at] econymdemoncouk> wrote in message
news:LqC1lBAe3RH+EwL+@econym.demon.co.uk...
>
> I can't see any simple fix, but the effect is decreased if you use
>   " + (Fn_Pigm(x,y,z).gray-0.5)/100 // Wood pigment "
> and increase the size of the contained_by box accordingly.

Thanks for the input Mike. I hadn't tried that. Looks like I'll
probably end up restricting the pigment range though, to avoid the
problem.

Alf

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