Chris Huff wrote:
> 
> In article <3872a859@news.povray.org>, "Patrick Dugan"
> <pat### [at] netinsnet> wrote:
> 
> > But WHY is there a torus depression?  The torus should carve out ONLY
> > where
> > the intersection of the height field and torus intersect, not have an
> > "extra" area showing outside of the heightfield.  While a "clear" pigment
> > works it is still not behaving the way a standard solid object would.
> 
> I am not sure what you mean. It behaves in exactly the same way a
> standard object does. A difference operation leaves the surface of the
> differencing object on the object being differenced.

For what it is worth I agree with Chris's assessment of the operation.
Practice differencing a small sphere from the face of a box or a plane
and you will see what he means.

-- 
Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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