OGL acceleration question - RE: +++ Slower Rendering in XSI 4.0 +++ 2004-06-08 - By Andras Ikladi
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>What results you get depend on what you're rendering as well as what
>graphics card you're using. What areas you'll see speedups in I've not
>investigated but I'd expect shadows, reflections and refractions to be
>faster and there's a good chance that global illumination might speed up
>with some of the newer cards. This is just guesswork, though.
> I did some tests on some heavy scenes on my laptop - vaio, 2.7Ghz,
>1Ghz, geforce 5600 - and saw frame times drop to about half of what they
>were. Toon shader, no reflection, lambert, soft shadows.
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> As far as reliability is concerned, you may have to be careful about
>slight differences between cards. Maybe.
>
>Most of what I've been doing here I've been concentrating on rapid motion.
>For all scenes, it's worth becoming familiar with this optimisation. It will
>considerably speed up motion blur, especially with dense scenes. I get
>considerable improvements without blur too, but you should be aware of at
>least one limitation, secondary rays can't be turned off with fast motion
>on.
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For shading acceleration to work, the package has to have the
accompagning cg shaders written.
Now obviously metashaders can help in this aspects.
I see most of the rendertree nodes having the M sign above their nodes,
so they supposedly have the cg shaders.
As i don`t have a proper gfxcard to try it, what is the current
situation in xsi?
thanks,
Andras
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