POV-Ray : Newsgroups : povray.binaries.images : Translucency (echo) : Re: Translucency (echo) Server Time
1 Aug 2024 22:17:10 EDT (-0400)
  Re: Translucency (echo)  
From: Blue Herring
Date: 21 Feb 2008 07:45:00
Message: <web.47bd713dc87c0e1db05f96f70@news.povray.org>
Christian Froeschlin <chr### [at] chrfrde> wrote:
> rad_def.inc, eh?  Oh my ... yes, it does looks useful.
> Just tried it on a simple test scene and was rather impressed.
> Actually even invested 1 min 22 secs for Radiosity_Final ;)

I like it =)  One thing I'm wondering, did you disable the ambient lighting in
your scene?  Nearly all radiosity enabled scenes use a line like this at the
beginning:

#default { finish { ambient 0 diffuse 1 } }

Sometimes the diffuse varies or is left out.  As radiosity is supposed to
replace the ambient global lighting model, anything with ambient > 0 emits
light (as I'm sure you know from your scene.)  A hint: put the above line
before any #include lines, at least any that declare textures.  Otherwise the
declared textures will get the default non-zero ambient.

Radiosity_Final is often not as dire as the comments make it sound.  I've needed
more aggressive settings than that on occasion.  I find Radiosity_IndoorHQ to be
the slowest.  Its that recursion_limit setting that can slow things down them
most, in my experience.  However, its worth the extra time for a final render,
when its needed.

You might want to check out this page, it has a tutorial on what all the
radiosity settings do: http://www.imagico.de/pov/radiosity.html

-The Mildly Infamous Blue Herring


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