POV-Ray : Newsgroups : povray.beta-test.binaries : Banding in radiosity Server Time
31 Oct 2024 22:21:05 EDT (-0400)
  Banding in radiosity (Message 1 to 6 of 6)  
From: Greg M  Johnson
Subject: Banding in radiosity
Date: 2 Oct 2001 11:04:37
Message: <3BB9D72D.A4DC904C@aol.com>
Netvista w/ PIII
Windows 2000 Professional??
beta.4

In the following image, I see banding that seems strange to me.
Apologies if this has already been reported.

Source file attached (a blend of scene files and someone's Gball macro,
the author of which I've forgotten.)


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Attachments:
Download 'huh08.jpg' (54 KB) Download 'huh08.pov.txt' (3 KB)

Preview of image 'huh08.jpg'
huh08.jpg

From: Christoph Hormann
Subject: Re: Banding in radiosity
Date: 2 Oct 2001 11:37:59
Message: <3BB9E019.8F5D55F5@gmx.de>
"Greg M. Johnson" wrote:
> 
> Netvista w/ PIII
> Windows 2000 Professional??
> beta.4
> 
> In the following image, I see banding that seems strange to me.
> Apologies if this has already been reported.
> 

There was some radiosity problem reported with recursion_limit > 2 but
this does not apply here.  

I'm not sure what kind of banding you mean, could you be more specific?

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/


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From: Greg M  Johnson
Subject: Re: Banding in radiosity
Date: 2 Oct 2001 11:39:41
Message: <3BB9DF67.B40882FB@aol.com>
Christoph Hormann wrote:

> I'm not sure what kind of banding you mean, could you be more specific?

Aren't those black bands in the lower right not supposed to be there?


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From: Christoph Hormann
Subject: Re: Banding in radiosity
Date: 2 Oct 2001 11:47:04
Message: <3BB9E23A.B6B04B65@gmx.de>
"Greg M. Johnson" wrote:
> 
> Aren't those black bands in the lower right not supposed to be there?

I only see those bright stripes, they indeed look strange, but they also
occur in Povray 3.1 and without radiosity.

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/


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From: Greg M  Johnson
Subject: Re: Banding in radiosity
Date: 2 Oct 2001 12:05:15
Message: <3BB9E564.B673FD53@aol.com>
Christoph Hormann wrote:

> I only see those bright stripes, they indeed look strange, but they also
> occur in Povray 3.1 and without radiosity.

In the lower rightmost sphere, doesn't it go from left to right:

unnatural black
expected color
unnatural black
expected color

?


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From: Christoph Hormann
Subject: Re: Banding in radiosity
Date: 2 Oct 2001 12:14:04
Message: <3BB9E88C.CE5BC2F1@gmx.de>
"Greg M. Johnson" wrote:
> 
> In the lower rightmost sphere, doesn't it go from left to right:
> 
> unnatural black
> expected color
> unnatural black
> expected color

The dark parts seem natural to me (it's also not completely black)

Maybe try 'N = 12000' without radiosity to clearly see the bright stripes.

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/


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