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|  |  | I've been trying to use cylinder lights to create a search-light effect,
using atmospheric media.  I have noticed that the end of the cylinder light
shows as a black disk, rather than just 'running out'.
Is this normal?  Can I stop this?
thanks
Mark
 Post a reply to this message
 Attachments:
 Download 'sample.jpg.dat' (39 KB)
 
 
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|  |  | Your image isn't showing Mark. At least for me that is...
  ~Steve~
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| From: Mick Hazelgrove Subject: Re: Cylinder lights have a black end-cap?
 Date: 18 Aug 2002 16:03:58
 Message: <3d5ffdae@news.povray.org>
 
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|  |  | I had this problem too but I vaguely remembered this cropping up before and used a
tight cone instead.
Mick
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|  |  | in news:3d5ff9e8$1@news.povray.org 25ct wrote:
> Your image isn't showing Mark. At least for me that is...
Rename the extension to .bmp
Ingo
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|  |  | In article <3d5ff521@news.povray.org>,
 "Mark Hanford" <mar### [at] the internet  com> wrote:
> I've been trying to use cylinder lights to create a search-light effect,
> using atmospheric media.  I have noticed that the end of the cylinder light
> shows as a black disk, rather than just 'running out'.
> 
> Is this normal?  Can I stop this?
This probably has something to do with how intervals are split up to 
optimize rendering for spotlights and cylinder lights and the fact that 
your media is infinite. Simple answer: don't use atmospheric media, use 
some kind of comtainer.
-- 
Christopher James Huff <cja### [at] earthlink  net>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tag  povray  org
http://tag.povray.org/ Post a reply to this message
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|  |  | oops.  Sorry...
"ingo" <ing### [at] home nl> wrote in message
news:Xns### [at] povray  org...
> in news:3d5ff9e8$1@news.povray.org 25ct wrote:
>
> > Your image isn't showing Mark. At least for me that is...
>
> Rename the extension to .bmp
>
> Ingo Post a reply to this message
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|  |  | But wouldn't this start as a point?  I need a visible diameter at the lamp
end of the beam.
Ideally I wanted a spotlight, but couldn't see how to make the start of it
wide enough.
Mark
"Mick Hazelgrove" <mic### [at] mhazelgrove fsnet  co  uk> wrote in message
news:3d5ffdae@news.povray.org...
> I had this problem too but I vaguely remembered this cropping up before
and used a tight cone instead.
>
> Mick
>
>
> Post a reply to this message
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|  |  | Hmmm,
I just tried a sphere{0,15 interior{media{...}}} instead of atmospheric
media, with the same problem
Mark
PS
here is the media
sphere{
  0, 20
  interior{
    media {
      intervals 10
      samples 1,1
      confidence 0.9
      variance 1.0/128
      ratio 0.9
      scattering {
        1,
        rgb<0.05,0.05,0.05>
      }
      method 3
    }
  }
  hollow
}
"Christopher James Huff" <chr### [at] mac com> wrote in message
news:chr### [at] netplex  aussie  org...
> In article <3d5ff521@news.povray.org>,
>  "Mark Hanford" <mar### [at] the  internet  com> wrote:
>
> > I've been trying to use cylinder lights to create a search-light effect,
> > using atmospheric media.  I have noticed that the end of the cylinder
light
> > shows as a black disk, rather than just 'running out'.
> >
> > Is this normal?  Can I stop this?
>
> This probably has something to do with how intervals are split up to
> optimize rendering for spotlights and cylinder lights and the fact that
> your media is infinite. Simple answer: don't use atmospheric media, use
> some kind of comtainer.
>
> --
> Christopher James Huff <cja### [at] earthlink  net>
> http://home.earthlink.net/~cjameshuff/
> POV-Ray TAG: chr### [at] tag  povray  org
> http://tag.povray.org/Post a reply to this message
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|  |  | in news:3d600212$1@news.povray.org Mark Hanford wrote:
> sphere{
>   0, 20
    
    put a transparent pigment here
>   interior{
> 
or else you'll se the container object with the default (black) texture.
Ingo
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|  |  | "ingo" <ing### [at] home nl> wrote in message
news:Xns### [at] povray  org...
> in news:3d5ff9e8$1@news.povray.org 25ct wrote:
>
> > Your image isn't showing Mark. At least for me that is...
>
> Rename the extension to .bmp
     Thanks Ingo, got it now.
     ~Steve~
>
> Ingo Post a reply to this message
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