POV-Ray : Newsgroups : povray.binaries.images : radiosity issue Server Time
8 Jul 2024 06:19:20 EDT (-0400)
  radiosity issue (Message 1 to 4 of 4)  
From: FNH
Subject: radiosity issue
Date: 17 Feb 2014 16:00:01
Message: <web.5302772cbf3150c95f52a9c30@news.povray.org>
The attached image show a snippet of my scene with changes in the "count"
setting of the radiosity configuration.

I need to up the "count" for other reasons in the scene. If you look closely at
these images you can see some artifacts just to the right of the glowing ring.
The ring is actually sitting on a smooth cylinder, so the red "bumps" are the
artifacts.

Is there another radiosity setting (apart from count) that might solve this
problem and smooth away my "bumps"?


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Attachments:
Download 'count_comparison.png' (78 KB)

Preview of image 'count_comparison.png'
count_comparison.png


 

From: Alain
Subject: Re: radiosity issue
Date: 17 Feb 2014 18:32:35
Message: <53029c13@news.povray.org>

> The attached image show a snippet of my scene with changes in the "count"
> setting of the radiosity configuration.
>
> I need to up the "count" for other reasons in the scene. If you look closely at
> these images you can see some artifacts just to the right of the glowing ring.
> The ring is actually sitting on a smooth cylinder, so the red "bumps" are the
> artifacts.
>
> Is there another radiosity setting (apart from count) that might solve this
> problem and smooth away my "bumps"?
>

You may try lowering minimum_reuse. The default is 0.015. Try something 
around 0.010.


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From: Robert McGregor
Subject: Re: radiosity issue
Date: 18 Feb 2014 08:05:01
Message: <web.530359fb87c4ed8691114470@news.povray.org>
"FNH" <nomail@nomail> wrote:
> The attached image show a snippet of my scene with changes in the "count"
> setting of the radiosity configuration.
>
> I need to up the "count" for other reasons in the scene. If you look closely at
> these images you can see some artifacts just to the right of the glowing ring.
> The ring is actually sitting on a smooth cylinder, so the red "bumps" are the
> artifacts.
>
> Is there another radiosity setting (apart from count) that might solve this
> problem and smooth away my "bumps"?

Those artifacts look suspiciously triangular to me. If the ring is sitting on a
smooth cylinder, what is that cylinder exactly? (a primitive cylinder, a mesh
cylinder, a mesh2 cylinder, etc.).

I can't quite visualize what's really going in this scene...
-------------------------------------------------
www.McGregorFineArt.com


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From: FNH
Subject: Re: radiosity issue
Date: 18 Feb 2014 13:20:00
Message: <web.5303a44287c4ed865f52a9c30@news.povray.org>
"Robert McGregor" <rob### [at] mcgregorfineartcom> wrote:
> "FNH" <nomail@nomail> wrote:
> > The attached image show a snippet of my scene with changes in the "count"
> > setting of the radiosity configuration.
> >
> > I need to up the "count" for other reasons in the scene. If you look closely at
> > these images you can see some artifacts just to the right of the glowing ring.
> > The ring is actually sitting on a smooth cylinder, so the red "bumps" are the
> > artifacts.
> >
> > Is there another radiosity setting (apart from count) that might solve this
> > problem and smooth away my "bumps"?
>
> Those artifacts look suspiciously triangular to me. If the ring is sitting on a
> smooth cylinder, what is that cylinder exactly? (a primitive cylinder, a mesh
> cylinder, a mesh2 cylinder, etc.).
>
> I can't quite visualize what's really going in this scene...
> -------------------------------------------------
> www.McGregorFineArt.com

It's a primitive cylinder.


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