Well, yes and no. Remember, we are dealing with surface normals _only_ in
this case. The triangle has no inside/outside. In theory the normals could
flip from one side of the triangle to the other, POV wouldn't give a damn.
It would simply result in a strange jump in lighting.
By the way, CSG objects often have surface normals pointing both in and out
(as a result of the difference operation). This creates problems only in
very specific cases, like using the trace() funcion to do something based on
the surface normal (creating furry CSG is a bitch :)
The Julia fractal is a 4D object. Rendering 4D objects isn't all that
difficult, but it would have to be a 3D "slice" of the object, so result are
hard to predict.

I think the real problem is that of ambiguity, which I described.

Also, I notice that I'm in a talkative mood today.

Margus

Ken wrote:
/.../
> have two opposing sides of a flat surface connected to each other. Looks
> like I got lucky this time.
> 
> --
> Ken Tyler
> 
> mailto://tylereng@pacbell.net

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