Hi alan,
It was what I was suspecting. So I did a quick test with MR standalone and also in Maya ( sorry to moan ). I think it's Xsi fault because I don't have these problems.
Well wierd.
Harry Bardak
TD / Compositor.
Http://perso.wanadoo.fr/harry.bardak/
+33 6 76 63 35 54
+44 781 661 4147
-----------------------------------------------
> Date: Wed, 7 Jun 2006 15:20:12 +0100
> From: skyphyr(at)gmail.com
> To: XSI(at)Softimage.COM
> Subject: Re: Re: Framebuffer and Gamma
>
> Mitchell and Lanczos both multiple some samples by negative values. It seems that these values, once combined with the gamma changes are causing your artifacts.
> I'm not sure what order the gamma and filtering are done in, but perhaps that's partially the reason. It also may be the results of applying a gamma function to a negative number and so order may not be relevant.
> Cheers,
> Alan.
> On 6/7/06, Harry Bardak <hb_xsimailinglist(at)hotmail.com> wrote:
> By disabling intensity clipping or going in Raw clip you have different result which isn't what I am looking after.
> I guess by activating it you go to a Linear result only. But well it s just speculation.
> Harry Bardak
> TD / Compositor.
> Http://perso.wanadoo.fr/harry.bardak/
> +33 6 76 63 35 54
> +44 781 661 4147
> -----------------------------------------------
> > Date: Wed, 7 Jun 2006 09:38:13 -0400
> > From: bmillerxsilist(at)gmail.com
> > To: XSI(at)Softimage.COM
> > Subject: Re: Framebuffer and Gamma
> >
> > Hi Harry,
> > I think the artifact is due to Intensity Clipping. If you turn that feature off, the image renders correctly (for me, anyway..)
> > Brett
> > On 6/7/06, Harry Bardak <hb_xsimailinglist(at)hotmail.com> wrote:
> > Hi everyone,
> > After the read of Luc Eric's article on xsi-blog, I was experimenting different approach to understand the Linear color space.
> > I am a bit stuck in my investigation because I met probably a bug in XSi.
> > If you look to these image :
> > http://perso.orange.fr/harry.bardak/img/Mr_bug_Gamma_1.jpg
> > http://perso.orange.fr/harry.bardak/img/Mr_bug_Gamma_0455.jpg
> > http://perso.orange.fr/harry.bardak/img/Mr_bug_Gamma_22.jpg
> > When I change the gamma value on the active effects tab, I got this kind of spike.
> > I guess it s a bug because it's appear only when you use mitchell or lanczos filter.
> > Box, Triangle, Gauss aren't affected by that or maybe they are too soft to get theses sample.
> > I don't think it's come from my computer but I'am using the last Intel dual core sytem. I don't have access to others computer so if someone can test this simple scene it would be great and we could report it as a bug to the support team.
> > Harry Bardak
> > TD / Compositor.
> > Http://perso.wanadoo.fr/harry.bardak/
> > +33 6 76 63 35 54
> > +44 781 661 4147
> > _________________________________________________________________
> > Be among the first to try the future of messaging: Check out Windows Live Messenger beta
> > http://ideas.live.com/programpage.aspx?versionId=0eccd94b-eb48-497c-8e60-c6313f7ebb73
> > ---
> > Unsubscribe? Mail Majordomo(at)Softimage.COM with the following text in body:
> > unsubscribe xsi
> _________________________________________________________________
> Be among the first to try the future of messaging: Check out Windows Live Messenger beta
> http://ideas.live.com/programpage.aspx?versionId=0eccd94b-eb48-497c-8e60-c6313f7ebb73
> ---
> Unsubscribe? Mail Majordomo(at)Softimage.COM with the following text in body:
> unsubscribe xsi
_________________________________________________________________
Be the first on your block to see the future of Hotmail: Try Windows Live Mail beta
http://ideas.live.com/programpage.aspx?versionId=5d21c51a-b161-4314-9b0e-4911fb2b2e6d
---
Unsubscribe? Mail Majordomo(at)Softimage.COM with the following text in body:
unsubscribe xsi
