POV-Ray : Newsgroups : povray.binaries.images : Radiosity problem solved (for the time being) - and looking ahead! Server Time
9 Aug 2024 13:28:05 EDT (-0400)
  Radiosity problem solved (for the time being) - and looking ahead! (Message 1 to 4 of 4)  
From: Jörg 'Yadgar' Bleimann
Subject: Radiosity problem solved (for the time being) - and looking ahead!
Date: 20 Feb 2005 05:46:19
Message: <42186a7b@news.povray.org>
High!

Thanks to Mark's suggestions, I increased the recursion level to 3 and 
downed the brightness (now it's 0.85). The result (first image attached 
here) is quite convincing to me, but it took my poor old AMD K6-II-400 9 
hours and 10 minutes (really time of a major system upgrade... I think 
I'll go for an Athlon running at 1.8 GHz). So for tweaking, I chosed a 
second radiosity setting, a modified version of Radiosity_Fast from 
rad_def.inc (second image).

The third image (with modified Radiosity_OutdoorLight from rad_def.inc) 
shows the whole building in its current state. Now I plan to place the 
whole thing into a suburb of (pre-war?) Kabul... but unfortunately, I 
lost the bookmark for those fantastic 3-arcseconds-per-pixel DEMs from 
the last great Space Shuttle global mapping mission after a system crash 
last month! I know it was on the USGS server, but USGS's web presence is 
quite ramified and sometimes confusing in its structure...

See you in Khyberspace!

Yadgar

Now playing: Oscillations (Silver Apples)


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Attachments:
Download '2005-02-19 khana-ye yadgar wip, take 2 (yadgar).jpg' (10 KB) Download '2005-02-20 khana-ye yadgar wip, take 5 (yadgar).jpg' (14 KB) Download '2005-02-19 khana-ye yadgar wip, take 4 (yadgar).jpg' (17 KB)

Preview of image '2005-02-19 khana-ye yadgar wip, take 2 (yadgar).jpg'
2005-02-19 khana-ye yadgar wip, take 2 (yadgar).jpg

Preview of image '2005-02-20 khana-ye yadgar wip, take 5 (yadgar).jpg'
2005-02-20 khana-ye yadgar wip, take 5 (yadgar).jpg

Preview of image '2005-02-19 khana-ye yadgar wip, take 4 (yadgar).jpg'
2005-02-19 khana-ye yadgar wip, take 4 (yadgar).jpg


 

From: dan B hentschel
Subject: Re: Radiosity problem solved (for the time being) - and looking ahead!
Date: 20 Feb 2005 14:45:00
Message: <web.4218e8871b7f16efb31e6d870@news.povray.org>
As has been mentioned before, it really kind of bothers me that there is
more light hitting the ceiling than there is hitting the floor. That just
doesn't look right, and it seems very unlikely to ever happen in real life.

 - dan B hentschel


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From: Eli
Subject: Re: Radiosity problem solved (for the time being) - and looking ahead!
Date: 20 Feb 2005 17:45:04
Message: <421912f0$1@news.povray.org>
To me it seems very likely to happen in real life, especially if the light 
source itself is exactly above the building and the sky itself doesn't emit 
(indirect) light. There will be no direct light hitting the floor inside, 
while the lit floor outside reflects onto the ceiling inside.


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From: scott
Subject: Re: Radiosity problem solved (for the time being) - and looking ahead!
Date: 21 Feb 2005 03:35:39
Message: <42199d5b$1@news.povray.org>
Eli wrote:
> To me it seems very likely to happen in real life, especially if the
> light source itself is exactly above the building and the sky itself
> doesn't emit (indirect) light. There will be no direct light hitting
> the floor inside, while the lit floor outside reflects onto the
> ceiling inside.

Especially with his "ground" that bright yellow.  In real-life most of the
time the ground is pretty dark compared to the blue sky / clouds.  Unless it
has been snowing, then you can tell the lighting is different inside.


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