in news:3C92D851.CC58115B@gmx.de Tim Nikias wrote:

> That's right, its in the docs. Though I think "not a useful result"
> isn't something I'd expect to run loose on the entire
> scene.

I'll see what I can changein the text.

>  Can't a default <0,1,0>, or better
> (because we're dealing with a <0,0,0> vector) a
><0,0,0> be returned instead of some haywire?

I would prefer an error. While making mesh generation macros I've been 
bitten by this often. Investigation always showed that I did something 
wrong in my code with the result of a <0,0,0> vector. It always took a 
while to find the problems because POV-Ray just goes on parsing after a 
vnormalize(<0,0,0>).

 
> Also, I didn't know that the reason for all this was
> this vnormalize-issue, I thought it had something to
> do with macros, because thats when it popped up
> first with my Particle-System, and then with the
> Gerbera.
> 

Shows the importance of reducing the scene as much as possible ;)

Ingo

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