>What happens if you play with the max gradient and such?  The isosurface
>you're rendering has a very large gradient at the surface (approximately
>equal to the resolution of the image) which would probably not respond
>well to a simple 'eval'.

That does it,
Mick's terrain looks to be ok with a max_gradient 20.
The box needs a much higher setting, about 100.

thanks Ron

ingo
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Met dank aan de muze met het glazen oog.

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