POV-Ray : Newsgroups : povray.binaries.images : Eavesdropping WIP - radiosity issues : Re: Eavesdropping WIP - radiosity issues Server Time
6 Aug 2024 21:38:16 EDT (-0400)
  Re: Eavesdropping WIP - radiosity issues  
From: Tim Nikias
Date: 14 Sep 2006 13:07:08
Message: <45098c3c@news.povray.org>
Thomas de Groot wrote:
> I need your expert comments :-)
> 
> This is the first serious render of the scene with radiosity. It is a 2-pass 
> job (first gathering radiosity data on an image half the size of this one; 
> took about 5+ hours; second pass was just about 45 minutes). There are still 
> ugly artifacts visible, especially on the columns. What is the best way to 
> go from here? I include the radiosity settings used so far. Normal and media 
> are off; Megapov settings were used

Well, what I usually do when using the two-pass method, is to use a 
lower error_bound on the first pass, and double or quadruple (always 2 
with an exponent attached) the error_bound on the loading pass. What 
this does is average more of the samples together, in effect smoothening 
the radiosity results somewhat. Of course this leads to loss of details, 
but detailed errors are smoothened away as well. You could have a look 
at my website as well, I've experimented a little with radiosity some 
time back:
http://www.nolights.de/projects/radiosity/radiosity.html

Hope that helps, even if just a little.

Regards,
Tim

-- 
aka "Tim Nikias"
Homepage: <http://www.nolights.de>


Post a reply to this message

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.