In article <3872213e@news.povray.org>, "Patrick Dugan" 
<pat### [at] usticom> wrote:

Forgot to answer this in my previous reply:

> according to the Povray docs I shouldn't be trying a "difference"
> with a heightfield.

The height_field object works fine with CSG, where in the POV-Ray manual 
does it say otherwise?

From the manual:
"There are thirteen different solid finite primitive shapes: blob, box, 
cone, cylinder, height field, Julia fractal, lathe, prisms, sphere, 
superellipsoid, surface of revolution, text object and torus. These have 
a well-defined  inside  and can be used in CSG (see section " 
Constructive Solid Geometry "). They are finite and respond to automatic 
bounding. You may specify an interior for these objects."

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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