In article <3a00920c@news.povray.org>, "Tom Melly" <tom### [at] tomandlucouk> 
wrote:

> I haven't tried it, but could it be that your bounding sphere is the same
> radius as the globe - a coincident surface type problem?
> Try making the bounding sphere a unit bigger?

Bounding shapes don't check depth, they simply test whether an 
intersection is possible or not. Kind of a visibility test. It might be 
possible for a problem to occur at the edges if a ray happens to just 
graze the sphere(something which is practically impossible and unlikely 
to produce a visible artifact if it does), but in the center of the 
bounding sphere it wouldn't be a problem.
In this case, a bounding sphere that surrounds the camera, lights, and 
any transparent/reflective objects should as well as a sphere 
surrounding the whole sphere.


> Also, shouldn't your globe be "inverse"?

Or hollow. Inverse would make more sense, but neither is actually 
necessary unless you are using media or fog.

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

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