David Wallace wrote:
> You are talking about the vertex shader part of a graphics card and its 
> limited applicability to surfaces generated mathematically via POV-Ray. 
>  I am more interested in the pixel shader and offloading the texture 
> evaluation, especially the built-in patterns, to the graphics card. That 
> should be much easier.

Of course, and much less effective, too ;-)  Before you embark on optimizing 
a ray-tracer, you need to understand where performance bottlenecks exist 
(see literature) ... and for ray-tracing that very, very rarely is the 
texturing code.

	Thorsten

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