Mark Wagner wrote:

  
> 
> Without seeing the code you are using, I can't tell you for certain.
>  The -1.#IND means that a recent calculation had an undefined result.  I'm
> guessing you're dividing by zero somewhere.  Do your calculations normalize
> the vector?
> 
> --
> Mark
> 
 Thanks Mark, as it turns out it is not really a show stopper

I tested:  #if ( Norm.x = -1 & Norm.y = -1 & Norm.z = -1 )
			don't use Norm
crude, I know, but good enough in this case

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