Hi Mark!

As you mention a torus, it's most likely, that you reached the boundaries of
floating-point-precision. There had been problems with tori reported before
and floating point precision was the answer even with quite reasonable
scales of the inner and outer radius. The closed form of the torus somewhat
"exploded" into a bunch of single points IIRC. As far as I know there is no
easy way to solve the problem (which has nothing to do with anti-aliasing).
Changing the scale of the object might help (make it bigger and move the
camera farther away).

As other mentioned, posting some sample-code and a picture of the problem
will help to look into your problem.

Regards,

Marc-Hendrik

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