POV-Ray : Newsgroups : povray.binaries.images : The remains of an iso-sphere. Take 4 (157KB) Server Time
16 Aug 2024 16:16:04 EDT (-0400)
  The remains of an iso-sphere. Take 4 (157KB) (Message 1 to 3 of 3)  
From: Tor Olav Kristensen
Subject: The remains of an iso-sphere. Take 4 (157KB)
Date: 3 Jan 2002 18:39:23
Message: <3C34EB12.4FC72528@hotmail.com>
A radiosity version this time.

It took a little less than 2 hours to render on a
1 GHz PC. (POV-Ray v3.5 beta 9)

The texture is a modified version of one that
Gilles Tran once made. Here's a link to that file:

"Radiosity test file #2":
http://news.povray.org/povray.text.scene-files/16395/105356/
news://news.povray.org/398EE231.F90E52DC%40inapg.inra.fr
(7. Aug 2000 to povray.text.scene-files)

Does anyone have suggestions for other suitable
textures for this scene ?


Tor Olav


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Attachments:
Download 'riemann07_.jpg' (157 KB)

Preview of image 'riemann07_.jpg'
riemann07_.jpg


 

From: Marc van den Dikkenberg
Subject: Re: The remains of an iso-sphere. Take 4 (157KB)
Date: 6 Jan 2002 17:28:21
Message: <Dc84PJyVKXZwaisFkOXSGqjH3LVn@4ax.com>
On Fri, 04 Jan 2002 00:36:50 +0100, Tor Olav Kristensen
<tor### [at] hotmailcom> wrote:

>
>A radiosity version this time.
>
>It took a little less than 2 hours to render on a
>1 GHz PC. (POV-Ray v3.5 beta 9)
>
>The texture is a modified version of one that
>Gilles Tran once made. Here's a link to that file:
>
>"Radiosity test file #2":
>http://news.povray.org/povray.text.scene-files/16395/105356/
>news://news.povray.org/398EE231.F90E52DC%40inapg.inra.fr
>(7. Aug 2000 to povray.text.scene-files)
>
>Does anyone have suggestions for other suitable
>textures for this scene ?

It looks very nice at a first glance, but I noticed something really weird:

If you brighten the image, you'll see that the texture inside the the
shadow of the object is completely different in the top & bottom part, with
a very sharp seperation between the two sections.

any idea what would be causing that?
-- 
Marc van den Dikkenberg
--
The PowerBasic Archives -- http://www.xlsior.org


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From: Tor Olav Kristensen
Subject: Re: The remains of an iso-sphere. Take 4 (157KB)
Date: 6 Jan 2002 21:20:15
Message: <3C39056B.AF6599D4@hotmail.com>
Marc van den Dikkenberg wrote:
> 
> On Fri, 04 Jan 2002 00:36:50 +0100, Tor Olav Kristensen
> <tor### [at] hotmailcom> wrote:
> 
> >
> >A radiosity version this time.
> >
> >It took a little less than 2 hours to render on a
> >1 GHz PC. (POV-Ray v3.5 beta 9)
>...
> It looks very nice at a first glance, but I noticed something really weird:
> 
> If you brighten the image, you'll see that the texture inside the the
> shadow of the object is completely different in the top & bottom part, with
> a very sharp seperation between the two sections.
> 
> any idea what would be causing that?

Hmmm... - That is weird.

I have no idea what happening in that shadow area.
It seems that that the normals are not being 
included in the calculations in that area.

The image was rendered with this radiosity setting:

Rad_Settings(Radiosity_OutdoorLight, on, off)

Last friday I started a rendering on my 1 GHZ work PC
of the same image, but with better radiosity settings:

Rad_Settings(Radiosity_OutdoorHQ, on, off)

Hopefully this image will not have the same errors.


Thank you for making me aware of this Marc.


Tor Olav


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