In article <39A00F7A.546A262F@pobox.com>, Anton Sherwood 
<bro### [at] poboxcom> wrote:

> Eh?  -PigFun + r^2 ought to be negative somewhere within the unit
> sphere.

Er, you are right, of course...for some reason I was adding, not 
subtracting. Oops.
Try specifying a max_gradient or eval. Sometimes this is necessary to 
get a correctly rendering surface. And you might want to try "function { 
-PigFun + sqrt(sqr(x)+sqr(y)+sqr(z)) }", so it falls off linearly from 
the center.

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

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