 | | | OGL acceleration question - RE: +++ Slower Rendering in XSI 4.0 +++ | OGL acceleration question - RE: +++ Slower Rendering in XSI 4.0 +++ 2004-06-08 - By kim aldis
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I also had the chance to chat last year with someone who'd been messing with
hardware acceleration; someone who was very good with this stuff. He'd been
getting renders he'd been measuring in hours down to minutes. Quite a lot of
specialised work had gone into this but it was interesting, nonetheless. I
can see a time when it's going to be more beneficial to upgrade your
graphics card than your CPU on renderfarms and with processing needs
becoming less of an issue in the domestic market, this is a nice little out
for those of us who still need the power.
> -- --Original Message-- --
> From: owner-xsi@(protected)
> [mailto:owner-xsi@(protected)] On Behalf Of kim aldis
> Sent: 08 June 2004 14:37
> To: XSI@(protected)
> Subject: RE: OGL acceleration question - RE: +++ Slower
> Rendering in XSI 4.0 +++
>
> 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.
>
> 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.
>
>
>
> > -- --Original Message-- --
> > From: owner-xsi@(protected)
> > [mailto:owner-xsi@(protected)] On Behalf Of Michael Klein
> > Sent: 08 June 2004 14:22
> > To: XSI@(protected)
> > Subject: OGL acceleration question - RE: +++ Slower
> Rendering in XSI
> > 4.0 +++
> >
> > What does OGL accel. exactly speed up?
> >
> > I did a test with my slower rendering scene (glossy
> > reflections) and the speedup with my OGL Quadro FX3000 was
> 9 seconds
> > (5:13 without, 5:04 with OGL accel.).
> >
> > Is it save to use OGL accel.? I remember some glitches and strange
> > artefacts in an older XSI version and never touched that feature
> > again.
> >
> > PoVR
> >
> > -- --Original Message-- --
> > From: owner-xsi@(protected)
> > [mailto:owner-xsi@(protected)] On Behalf Of Olivier
> jeannel Posted
> > At: Tuesday, June 08, 2004 2:29 PM Posted To: XSI
> > Conversation: +++ Slower Rendering in XSI 4.0 +++
> > Subject: Re: +++ Slower Rendering in XSI 4.0 +++
> >
> >
> > By OGL acceleration, do you mean the use of the GPU of an FX400 ?
> >
> > -- -- Original Message -- --
> > From: "+" <softimage@(protected)>
> > To: <XSI@(protected)>
> > Sent: Tuesday, June 08, 2004 2:19 PM
> > Subject: Re: +++ Slower Rendering in XSI 4.0 +++
> >
> >
> > > jordibares wrote:
> > >
> > > >Mental ray 3.3 has been incredibly faster in our tests (not using
> > reflections and glossy) but opengl acceleration, fine
> displacement and
> > motion blur all together.
> > > >
> > > >We say jumps from 40 minutes a frame to 5 min. a frame.
> > > >
> > > >
> > >
> > > that's nice... can you tell something about the machines you're
> > > running (cpu, graphicscards, etc...) or is that a
> top-secret thingy
> > > like in the formula1-championship...
> > > ---
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