POV-Ray : Newsgroups : povray.documentation.inbuilt : radiosity and media : Re: radiosity and media Server Time
20 Jan 2022 11:19:22 EST (-0500)
  Re: radiosity and media  
From: Kenneth
Date: 5 Feb 2013 11:55:01
Message: <web.51113755cb86620bc2d977c20@news.povray.org>
Christian Froeschlin <chr### [at] chrfrde> wrote:
> I tend to forget how they work together...
> There are different effects possible and it is not quite clear what
> happens here. Can media get illuminated by radiosity? Does media reduce
> the amount of light received by objects in the vicinity of an emitting
> object? Does emissive media contribute light to radiosity calculations?

There *was*/is a problem in POV-Ray with rad and media (in the current stable
v3.62 release and earlier) which sort of contributes to the 'lack of clarity' in
the docs. For object media (a sphere with a transparent pigment, for example),
any other objects or parts thereof that are inside the media sphere do not
receive radiosity lighting *from the media*--neither scattering nor emission
types--but objects OUTSIDE it do. ('Atmospheric' media doesn't have this
problem.) But it takes a rather particular/specialized test scene to show the
effect; it's usually not grossly obvious, due to other scene objects also
contributing rad light.

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