POV-Ray : Newsgroups : povray.general : Glamour behind emission media Server Time
10 Aug 2024 09:16:41 EDT (-0400)
  Glamour behind emission media (Message 1 to 3 of 3)  
From: Greg M  Johnson
Subject: Glamour behind emission media
Date: 12 Feb 2000 23:36:22
Message: <38a634c6@news.povray.org>
I've had fun using emission media to make things like glowing plasma in
a jar. The odd thing, however, is when I make an image with anything
other than a black background.  It just looks so fake and uncool with
the background showing behind, through the lit areas of the media.

Any tips?


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From: ingo
Subject: Re: Glamour behind emission media
Date: 13 Feb 2000 03:07:59
Message: <8ED957B1Aseed7@204.213.191.228>
Greg M. Johnson wrote:

>...  It just looks so fake and uncool with
>the background showing behind, through the lit areas of the media.
>
>Any tips?

Add some absorbing media with the inverse colour.

Ingo

-- 
Photography: http://members.home.nl/ingoogni/
Pov-Ray    : http://members.home.nl/seed7/


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From: Greg M  Johnson
Subject: Re: Glamour behind emission media
Date: 13 Feb 2000 08:20:26
Message: <38a6af9a@news.povray.org>
Thanks, you set me on right track. Here is the solution.  Absorb "0"
where your density is "empty", "1" where there is "something."  The code
below is "not art yet," but it is the effect I was searching for...


media {
   intervals 10
   emission rgb 1   samples 2, 100     confidence 0.9999   variance
1/1000   ratio 0.9
   density {
     color_map{
        [0.0 rgb <0,0,0.0>]
        [0.5 rgb <0,0,0.0>]
        [0.851 rgb <0.8, 0.18, 0.04>/2]
        [1.0 rgbt <1,.61,.1>]
      }
      scale 5
    }
 }
 media {
   intervals 10
   absorption rgb 1 samples 2, 100  confidence 0.9999   variance
1/1000   ratio 0.9
  density {
        bumps
        color_map{
        [0.0 rgb 0]
        [0.5 rgb 0]
        [0.851 rgb 1 ]
       [1.0 rgbt 1 ]      }
      scale 5
    }
 }

ingo wrote:

> Greg M. Johnson wrote:
>
> >...  It just looks so fake and uncool with
> >the background showing behind, through the lit areas of the media.
> >
> >Any tips?
>
> Add some absorbing media with the inverse colour.
>
> Ingo
>
> --
> Photography: http://members.home.nl/ingoogni/
> Pov-Ray    : http://members.home.nl/seed7/


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