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.

Thanks.

Post a reply to this message

"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

Post a reply to this message

Hello Bob,
I have not worked as much as on the conversion yet so I do not have ideas
like you do. But I had a scene in mind and wanted to take some ideas from
Atmo.pov only to find out that Atmosphere is no longer supported. Most
likely I have to try it in V3.0 and at the same time work on rendering it in
v3.5.
I also rendered your scene you attached yesterday. The result is very far
from the original. I will get the one you attached in binaries and see how
it goes.
I also sent a cancelation for my previous post but it is still there.

Khalid

"Hughes, B." <omn### [at] charternet> wrote in message
news:3ffa492a$1@news.povray.org...
> "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
>
>

Post a reply to this message

"Khalid Hanna" <kha### [at] rogerscom> wrote in message
news:3ffaaf48$1@news.povray.org...
> I have not worked as much as on the conversion yet so I do not have ideas
> like you do. But I had a scene in mind and wanted to take some ideas from
> Atmo.pov only to find out that Atmosphere is no longer supported. Most
> likely I have to try it in V3.0 and at the same time work on rendering it
in
> v3.5.

I think most people would advise staying in 3.5 and working from there. For
anything except the removed features/keywords you can always use the
#version directive to switch syntax compatibilty. Of course, if you find it
impossible to design a scene without the obsolete features you don't have a
choice besides working with 3.0 as well.
Thing is, it just gets confusing if you try to keep using an older version
and still take advantage of newer changes.

> I also rendered your scene you attached yesterday. The result is very far
> from the original. I will get the one you attached in binaries and see how
> it goes.

That could be due to assumed_gamma changes; although, since it wasn't
compared directly to my POV 3.02 until today, I suspected it would look
quite different. Also, I should point out that media method 3 is based on
the way version 3.0 atmosphere worked. That's my understanding, anyway.

> I also sent a cancelation for my previous post but it is still there.

It tends to stay saved once you already view it, but should be gone for
people yet to encounter this group.

Bob H.

Post a reply to this message