POV-Ray : Newsgroups : povray.newusers : Radiosity Server Time
5 Nov 2024 15:54:49 EST (-0500)
  Radiosity (Message 1 to 2 of 2)  
From: M J Smith
Subject: Radiosity
Date: 4 Mar 1999 12:57:23
Message: <36dec983.0@news.povray.org>
What radiosity routines are included in POV? I would like to render a scene 
that has low lightly with very little specular reflection. I know I could add 
an ambient light term, but seems to have the effect of changing the 
"contrast".

Cheers

Mike


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From: Bob Hughes
Subject: Re: Radiosity
Date: 4 Mar 1999 23:27:18
Message: <36DF5CF1.BFB650B3@aol.com>
global_settings {
 assumed_gamma 2.4 //default 2.2, a lower value is brighter, higher
darker
 ambient_light <.9,.9,.9> //or just 0.9, lower darkens, higher lightens
 }

Not so sure you can keep contrast adjusted too well either way though,
adjusting 'diffuse' lower is a way to raise or lower the contrast when
specular highlights are changed along with it too (sounds like in your
case). It varies, but you'll most likely need to do a shifting of all
these based upon your desired output.
You mention 'radiosity', are you actually using radiosity?
Unfortunately there is no global diffuse, might make for a good addition
to the program.

M J Smith wrote:
> 
> What radiosity routines are included in POV? I would like to render a scene
> that has low lightly with very little specular reflection. I know I could add
> an ambient light term, but seems to have the effect of changing the
> "contrast".
> 
> Cheers
> 
> Mike

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