> I was messing around with some ideas lately about the possibility
of
> implementing a raytracer using the acceleration of modern cards,
like
> for example letting opengl do the zbuffer stuff to get a preview of
> which objects are more likely to be intersected by primary rays.
> I am willing to know your thoughts to this respect. Do you think
it's
> possible? What are the possibilities?

Check out this one: http://graphics.stanford.edu/papers/rtongfx/
Still gotta look wether what they use is in Opengl2 already...
Anyone can tell? Tim?

Sincerely
Piero