> I think you are right on this. Thats just how the render-pipeline goes into
> "OpenCL".
>
> Let me say that its just a old missconception to say that GPU's "can only render
> simple stuff". This was true in the past but let me show you this video to
> correct your opinion to the opposite.
>
> https://www.youtube.com/watch?v=ByJGkSzh4eQ
>
> In fact "modelling and rendering" in REAL-TIME of several Diamonds, including
> transparence, refraction and REAL dispersion is "state-of-the-art". As you can
> see in this video.

It's only rendering a triangle mesh though. POV is far more complex than 
that. I have not see a GPU raytracer that can render many different 
mathematical primitives at the same time. *That* requires an awful lot 
more work, and won't be anywhere near as optimised as a raytracer that 
renders just meshes or just isosurfaces etc.

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