"Timothy R. Cook" <tim### [at] scifi-fantasycom> wrote in message
news:3df81524@news.povray.org...
> Observe attached image with a cube differenced from a heightfield.
> How do I get the cube to completely difference from the heightfield
> without leaving the planar surface?  Also, if I enlarge the cube
> being differenced along the vertical axis, it effectively 'pushes'
> the surface of the heightfield...

If you want to leave the HF surface only and not have any parts of the box
shape showing then use clipped_by instead of difference. I don't know what
you meant by that last sentence.

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