> > A bit of theory: The goal is to create a set of "random" direction rays
> > so that the probability of close-to-normal versus close-to-tangent rolls
> > off in a cos-theta curve, where theta is the deviation from normal.
> > That is, lots of rays close to normal, and very few close to tangent.
> > You also want to have all of the rays be evenly spread, no matter how
> > many you want to use.  The lookup array has an array of points carefully
> > chosen to meet all of these criteria.
> 
> That's what I thought, except I expected the probability to be
> sin(theta)
> (or cos(theta), if theta is the angle between ray and TANGENT), implying
> fewer rays close to normal than close to tangent. Is this a typo?

Am posting examples in p.b.i.

  Mark

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