POV-Ray : Newsgroups : povray.general : Old "halo" feature Server Time
31 Jul 2024 04:27:57 EDT (-0400)
  Old "halo" feature (Message 1 to 4 of 4)  
From: mavericfso
Subject: Old "halo" feature
Date: 28 Nov 2007 23:30:01
Message: <web.474e400dce4477ccd5e7e16f0@news.povray.org>
Salutations.

I ran across an interesting picture on the IRTC site that has a very nice nebula
effect. In efforts to replicate it and figure out how it works to use it in my
own applications, I started with the old fashioned copy and paste technique.
Well, I soon found out that it has been discontinued, replaced with "media" and
"interior". Well, not being a very seasoned man, I have not had any success in
"retrofitting" the old halo function to be used in interior, or media with
similar results.

If someone could do me a favor and tell me how to convert it (being that the
help files say nothing about the equivalent values or terms) to what it should
be, that would be most excellent.

Any information, perhaps a quote of said function, that could help, all you need
do is ask.

--Jim D.


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From: nemesis
Subject: Re: Old "halo" feature
Date: 29 Nov 2007 10:20:01
Message: <web.474ed87b293e6b6ff48316a30@news.povray.org>
link for the picture and source?


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From: Fa3ien
Subject: Re: Old "halo" feature
Date: 29 Nov 2007 17:34:03
Message: <474f3e5b$1@news.povray.org>

> Salutations.
> 
> I ran across an interesting picture on the IRTC site that has a very nice nebula
> effect. In efforts to replicate it and figure out how it works to use it in my
> own applications, I started with the old fashioned copy and paste technique.
> Well, I soon found out that it has been discontinued, replaced with "media" and
> "interior". Well, not being a very seasoned man, I have not had any success in
> "retrofitting" the old halo function to be used in interior, or media with
> similar results.

Nobody, and no algorithm or trick can do that.  Halos and media are 
really different beasts.  The best you can do is learn to use media,
then try to re-create the effect.  That's a classic problem, and this
was always the only answer, sorry.

Fabien.


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From: mavericfso
Subject: Re: Old "halo" feature
Date: 29 Nov 2007 21:35:00
Message: <web.474f75e3293e6b6fd5e7e16f0@news.povray.org>
"nemesis" <nam### [at] gmailcom> wrote:
> link for the picture and source?

The link is http://www.irtc.org/stills/1996-10-31.html and the picture is the
third-place winner (nebulosi.jpg).

-----------------------------------------------------------------------------
Fa3ien <fab### [at] yourshoesskynetbe> wrote:
> Nobody, and no algorithm or trick can do that.  Halos and media are
> really different beasts.  The best you can do is learn to use media,
> then try to re-create the effect.  That's a classic problem, and this
> was always the only answer, sorry.
>
> Fabien.

Ah, your response saddens me, but thank you for the quick and concise answer.
I'm now going to try to learn media... wish me luck!

--Jim D.


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