hi peter....
yes after testing every opportunity it is:
"struggling with the amount of fine detail you're trying to fit into just those few pixels",
as you said.
but that's the way we have to go.....
i only have this amount of pixels (512x512), because that's the way it is broadcasted via www.combots.com and the 4 characters have this kind of hair because the licensee is very specific.
so, i think we worked out a way that works.....there's still a bit flickering/moire sort of thing going on, but much less......we used the hairrenderer instead of the geoshader and turned up sampling to 3/3....now it's ok...it won't get any better....they have to live with that i'd say.
cheers,
dominique
-----Ursprüngliche Nachricht-----
Von: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] Im Auftrag von peter boeykens
Gesendet: Dienstag, 29. Mai 2007 20:17
An: XSI(at)Softimage.COM
Betreff: Re: Long hair flickering
> the final resolution is 512x512pix.....
> i also tried to render double size and scale down.
> ....no convenient results either.....
so what did the double size render look like, BEFORE downscaling?
if it didnt flicker and the downscale does, that could mean that the resolution is just not enough to adequately show the detail present, and no amount of oversampling is gonna really resolve it.
It would be rather "moire" (interference) than flicker.
same as you get with tiny lines moving/rotating slowly, even more so if you have interlacing.
there is a point where its not sampling or render settings anymore, but you are rather struggling with the amount of fine detail you're trying to fit into just those few pixels.
still, you should certainly give the rasterizer a try, it used to be much better for respecting sub pixel detail.
(though I couldnt tell for v6 - it behaves differently for each major
release)
----- Original Message -----
From: "FLINX(at)mark13" <flinx(at)mark13.com>
To: <XSI(at)Softimage.COM>
Sent: Tuesday, May 29, 2007 11:52 AM
Subject: AW: Long hair flickering
oh holger is quite fast....but i'll jump in here...
it's in the render...no simulation.....nothing animated yet, just the
turnarounds of 4 characters...
we tried alot of aa-settings, starting with my usual default settings 1/2,
sampling contrast 0,1
buffer gauss 2....
then i raised it stepbystep....now i'm up to 2/3 sampling 0,05 and i
switched to mitchell 4, because the character itself looked better with
that, but i also tried gauss and had no differences in the hair flickering.
at the moment i'm trying to use NOT the hairgeoshader, but the
hairrenderer....i'll have to wait for the results....but it' doesn't look
good from the first pix......
the final resolution is 512x512pix.....i also tried to render double size
and scale down.....no convenient results either.....
we haven't done hair in 6 and now 6.01, this is the first test.....could it
have something to do with the version?
we're a bit stuck here....the characters are fine for the client in still...
actually we're just about to jump into animation....but since they are
licensed characters....we will have to wait with the animation untill we are
sure that this turnaround is exactely what will come out later....
because the licensee is quite rigorous with his characters.......
but it's flickering!
thanx for suggestions....
dominique
-----Ursprüngliche Nachricht-----
Von: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] Im Auftrag von
Kim Aldis
Gesendet: Dienstag, 29. Mai 2007 11:04
An: XSI(at)Softimage.COM
Betreff: RE: Long hair flickering
Flickers as in the render buzzes or as in the simulation buzzes. If the
former, what are you anti-aliasing settings?
> -----Original Message-----
> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
> Behalf Of Holger Weiss
> Sent: 29 May 2007 11:55
> To: XSI(at)Softimage.COM
> Subject: Long hair flickering
>
> Hi,
>
> Probably a problem discussed, ut can´t find it.
> I have a charakter with long hairs and they flicker .
> I´ve rendered it doubled sized.
> I used geo hair shader
> But it still flickers
> So is there a solution for that??? ( i hope there is one)
>
> So thanks in advance
>
> Regards
> holger
>
>
>
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