POV-Ray : Newsgroups : povray.beta-test : Question regarding scattering media parameters Server Time
31 Oct 2024 08:17:46 EDT (-0400)
  Question regarding scattering media parameters (Message 1 to 3 of 3)  
From: Samour
Subject: Question regarding scattering media parameters
Date: 21 Jul 2009 16:30:00
Message: <web.4a66244d94feb88464c007780@news.povray.org>
I was wondering what is the source (from a physical/scientific perspective) of
the formulas for k that are related to the various scattering types and how
closely they resemble the actual scattering that would occur in a real world
context (with a focus on the Mie and Rayleigh types).

I am simulating a dust cloud and I was going through the source code to see if I
can make a clear correspondence between the parameters used in POV-Ray, namely k
and alpha, and those used when discussing scattering phenomenon such as
extinction and backscatter ratios. For example, is alpha the extinction
coefficient and k the backscatter? What is the relation between the real
parameters and the ones in POV-Ray? Thanks.

Samer


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From: clipka
Subject: Re: Question regarding scattering media parameters
Date: 21 Jul 2009 23:05:00
Message: <web.4a6681924e91761e785322500@news.povray.org>
"Samour" <nomail@nomail> wrote:
> I was wondering what is the source (from a physical/scientific perspective) of
> the formulas for k that are related to the various scattering types and how
> closely they resemble the actual scattering that would occur in a real world
> context (with a focus on the Mie and Rayleigh types).

In case you don't get any helpful answers here (it's not particularly
beta-specific after all), you might try in povray.advanced-users, for instance.


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From: Samour
Subject: Re: Question regarding scattering media parameters
Date: 22 Jul 2009 10:55:01
Message: <web.4a6727874e91761e64c007780@news.povray.org>
"clipka" <nomail@nomail> wrote:
> "Samour" <nomail@nomail> wrote:
> > I was wondering what is the source (from a physical/scientific perspective) of
> > the formulas for k that are related to the various scattering types and how
> > closely they resemble the actual scattering that would occur in a real world
> > context (with a focus on the Mie and Rayleigh types).
>
> In case you don't get any helpful answers here (it's not particularly
> beta-specific after all), you might try in povray.advanced-users, for instance.

Actually, I was going to post it there initially. Will do, thanks for the
suggestion.


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