POV-Ray: Newsgroups: povray.general: Jitter in radiosity?

POV-Ray : Newsgroups : povray.general : Jitter in radiosity?		Server Time 6 Aug 2024 02:22:48 EDT (-0400)

From: Felix Wiemann
Subject: Jitter in radiosity?
Date: 7 Jul 2002 06:51:05
Message: <3d281d17@news.povray.org>

Hi!

Are radiosity samples jittered?

I noticed during pretrace that the contours of the objects aren't really 
straight, but I haven't found anything in the docs about it.

Btw, the effect doesn't disappear when I'm using -J.

Thanks in advance,
Felix Wiemann

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From: Christoph Hormann
Subject: Re: Jitter in radiosity?
Date: 7 Jul 2002 10:09:26
Message: <3D284B98.520F2D06@gmx.de>

Felix Wiemann wrote:
> 
> Hi!
> 
> Are radiosity samples jittered?
> 
> I noticed during pretrace that the contours of the objects aren't really
> straight, but I haven't found anything in the docs about it.
> 
> Btw, the effect doesn't disappear when I'm using -J.

It seems you confuse things a bit.  The pretrace rays are jittered
according to the aa settings, but the samples are not.  It would lead to
highly not reproducible and probably worse results.

Christoph

-- 
POV-Ray tutorials, IsoWood include,                 
TransSkin and more: http://www.tu-bs.de/~y0013390/  
Last updated 30 Jun. 2002 _____./\/^>_*_<^\/\.______

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From: Felix Wiemann
Subject: Re: Jitter in radiosity?
Date: 8 Jul 2002 11:26:17
Message: <3d29af19@news.povray.org>

Christoph Hormann wrote:

> It seems you confuse things a bit.  The pretrace rays are jittered
> according to the aa settings, but the samples are not.  It would lead to
> highly not reproducible and probably worse results.

But even if I use -J the pretrace rays seem to be jittered. Or is this just 
some inaccuracy?
-- 
Felix Wiemann

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From: Christoph Hormann
Subject: Re: Jitter in radiosity?
Date: 8 Jul 2002 11:41:57
Message: <3D29B2C6.1B9AAF5D@gmx.de>

Felix Wiemann wrote:
> 
> But even if I use -J the pretrace rays seem to be jittered. Or is this just
> some inaccuracy?

I don't know, what does happen if you use the mosaic preview without
radiosity?

Christoph

-- 
POV-Ray tutorials, IsoWood include,                 
TransSkin and more: http://www.tu-bs.de/~y0013390/  
Last updated 30 Jun. 2002 _____./\/^>_*_<^\/\.______

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From: Felix Wiemann
Subject: Re: Jitter in radiosity?
Date: 9 Jul 2002 08:36:16
Message: <3d2ad8c0@news.povray.org>

Christoph Hormann wrote:

> Felix Wiemann wrote:
>> 
>> But even if I use -J the pretrace rays seem to be jittered. Or is this
>> just some inaccuracy?
> 
> I don't know, what does happen if you use the mosaic preview without
> radiosity?

My beta is currently expired, but I never noticed this with mosaic preview 
without radiosity (although I use mosaic preview very often).
-- 
Felix Wiemann

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