In article <3A0A0986.10DA189E@mail.com>, Ben Birdsey 
<cla### [at] mailcom> wrote:

> 	Try using a quartic is oriented along the z-axis.

I prefer isosurfaces myself, though they currently require a patched 
version of POV. I mean, which is easier? This:

quartic{
   <    0, 0,    0, 0,  0, 0, 0,
     xxzz, 0,    0, 0,  0, 0, 0,
        0, 0,    0, 0,  0, 0, 0,
        0, 0, yyzz, 0,  0, 0, 0,
        0, 0,    0, 0, zz, 0, const >
...

or this:(Not exactly the same as your function, but it should give you 
the general idea)
isosurface {
    function {z - 1/sqrt(sqr(x) + sqr(y) + 0.01)}
    threshold 0
...

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

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