Am 14.12.2010 00:08, schrieb CShake:

> 2) vray has GPU acceleration. I know the official stance here is that
> povray needs to work with double instead of float, but nowadays CUDA
> allows for that (at reduced speed) and really, there probably are places
> in the scene where floats would work fine.

That /used/ to be the official stance, when double precision floating 
point arithmetics wasn't available in GPUs.

While this is a non-issue nowadays, there are other remaining issues 
that make GPU use problematic (most notably the inavailability of 
recursions) as well as of low benefit (most notably the fact that GPUs 
are most efficient on bulk data that undergoes the same 
transformations). Avoiding those issues is possible, but in the case of 
POV-Ray would require a complete redesign of its internal architecture.


> 4) vray advertises motion blur, bokeh on DoF, ... All things that _can_
> be done with povray but require someone to write macros.

In the case of bokeh, macros are no longer needed (with version 3.7 that 
is) ;-)

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