Nathan Kopp wrote:
 
[ ... ]
> This particular triangle works just fine with POV 3.1 for me.

As a smooth_triangle?
I am using 3.1d, DOS version, and that smooth_triangle is
reported degenerate. The points and normals are generated by 
macros and if I at least knew why it was degenerate (or being
reported as such) I could do automate some 'detect and correct', 
like substituting a 'flat' triangle (which works fine with 
those coordinates). 

> If you accidently typed something like:
> smooth_triangle{
>        v1,n1,
>         v2,n2,
>         v2,n3  // note this line
> }

Well, in my case, this is actually the most likely cause, 
but I cutnpasted directly from the source.

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