Ron Parker wrote in message ...
> I wonder if it has anything to do with the definition of EPSILON.


Perhaps, but when I replaced camera with typical perspective (with the same
locattion and image sizes) bugs disappeared.

I found at polysolv.c definition of SMALL_ENOUGH with value 1.0e-10 and it is
rather small enough but in torus.c there is value ROOT_TOLERANCE with 1.0e-4 and
I think this is the problem.

Is there any reason why such limitiations can't be changed from script level ?
Perhaps optional float parameter to keyword sturm could help. I haven't windows
compiler (only djgpp or cygwin) but I prefer adventage of build-in editor.

ABX

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