>> Also look at nVidia's Gelato, they use the 3D card to help with 
>> rendering, so it can't be all bad.  Maybe there is some technical paper 
>> somewhere about what Gelato does that would give some ideas for POV4?
>
> Gelato uses undocumented proprietary GPU commands on the cards.
> NVIDIA may (probably will) introduce new commands as hardware
> improves, making their products better, while public standards will always
> lag behind. It's just a matter of competition.

I was thinking more of just using the "standard" shaders rather than 
programming the cards directly.  AFAIK the shaders are available to program 
in both OpenGL and DirectX, and will run on both ATI and nVidia cards.

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