In article <3A579D69.CE37BC7B@faricy.net>, David Fontaine 
<dav### [at] faricynet> wrote:

> Simply use the last value that didn't intersect, rather than the 
> first that did. If you wanted to be really precise, you could make a 
> bisection macro too.

There is still the risk of some small part protruding out into the space 
between traces...but this method works for relatively "smooth" objects 
without small scale points. For example, it wouldn't work well on a 
piece of pine tree branch, or a sea urchin, but a computer monitor 
should work fine.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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