Try any other difference which does not contain a heightfield: do you get an infinite
object? (That could be a problem concerning h-f). And have you really tried the most
simple example: box {-1,1 inverse}?
Like ABX you are thinking in terms of volumes. POV-Ray dislikes that concept.
--
Jonathan.
Home: http://digilander.iol.it/jrgpov
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