Warp wrote:

>   Of course the problem is that calculating the intersection of a ray and
> an object is relatively simple, but calculating the intersection of a cone
> and an object (so that you can calculate how many % is covered) is very
> complicated. It simplifies things when you only have to do cone-triangle
> intersections (basically you only have to calculate how many % of the
> triangle resides inside the cone), but still.

Pixar's renderer turns everything into sub-pixel sized quadrilaterals, 
so they can definitely put this technique to work.

On the other hand, since Pixar has added ray-tracing to its in-house 
renderer in order to achieve certain effects, it's safer to say that 
pure tracers and pure rasterizers will both be replaced by renderers 
that do both.

Regards,
John

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