"Khalid Hanna" <kha### [at] rogerscom> wrote in message
news:3ffa14f0$1@news.povray.org...
> I know that povray 3.5 no longer supports Atmosphere (replaced by Media).
> Now in V3.0 (which I
> still have a copy of) there was a file called Atmo.Pov and it animated a
> ratating light source in foggy atmosphere. How can I change it to be
> compatible with the 3.5 version.

Hi there again, Khalid.

I've redone the scene file found in the directory
POV-Ray\POV3DEMO\ATMOS\atmo4.pov, now that I dug out the old 3.02 version
and used it to compare it with 3.5 media. I think I got it pretty close. You
should be able to copy the atmosphere declarations to another scene file and
get similar renders to the old 'atmosphere' feature.

What I'm unsure of, is, how will it behave without a room to contain it? And
will there be artifacts due to differences in sampling, intervals and
whatever else. In other words, I only tweaked values until it looked okay.
Most notably is the lack of a 'distance' parameter for media, so I'm
guessing density might help with that. What is obvious in my edited scene
file is that I had to use low extinction values. I wished I didn't need to,
since that is always said to be a kind of artificial adjustment.

Posting the new scene file to the povray.binaries.scene-files group. Please
forgive me if this has been done in the past already, I liked the challenge
in making this conversion.
-- 
Bob H.
http://www.3digitaleyes.com

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