Using POV version 3.1d for DOS, this triangle is not 
reported as degenerate as part of a mesh{}, but it 
is reported degenerate if declared by itself or as 
part of a union{}. However the triangle is not 
rendered properly in any of these (in a mesh, by itself, 
or in a union).
By making random changes in the normals, sometimes I can get 
it rendered, but what changes in the normals is allowing it 
to be rendered is a mystery to me. Some changes work, and 
some don't.

If it is declared as a plain triangle 
	triangle{v1,v2,v3}
then it is rendered ok.

david sharp wrote:
> #declare v1=<116.50351, 37.28418, -14.46650>;
> #declare n1=<-0.87727, -0.19526, 0.43849>;
> #declare v2=<73.18535, 44.36221, -1.11751>;
> #declare n2=<-0.90956, 0.27350, 0.31289>;
> #declare v3=<123.66611, 65.86183, 12.58927>;
> #declare n3=<-0.8777, -0.19526, 0.43849>;
> 
> smooth_triangle{
>         v1,n1,
>         v2,n2,
>         v3,n3     
> }

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