POV-Ray : Newsgroups : povray.general : help image maps & fog Server Time
5 Nov 2024 11:21:14 EST (-0500)
  help image maps & fog (Message 1 to 6 of 6)  
From: Mick Hazelgrove
Subject: help image maps & fog
Date: 27 Sep 1998 14:25:11
Message: <01bdea3b$c8ad1bc0$6b43a8c2@wphnvffu>
Help

I've being trying to put an image map of an insects wing in a scene with
fog

Where the box on which the image map is projected meets the fog it shows up
and the background shows through the fog

Does anyone know how to get round this - I've tried upping Max_Trace level
but it has know effect.

Hope someone knows the answer to this one

Mick Hazelgrove


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From: Johannes Hubert
Subject: Re: help image maps & fog
Date: 27 Sep 1998 14:39:23
Message: <360e784b.0@news.povray.org>
Since you didn't mention it: Did you make the box hollow?

Johannes.


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From: Mick Hazelgrove
Subject: Re: help image maps & fog
Date: 27 Sep 1998 15:49:21
Message: <01bdea47$8bf66400$74eba8c2@wphnvffu>
making the box hollow makes the effect darker

Mick

Johannes Hubert <jhu### [at] algonetse> wrote in article
<360e784b.0@news.povray.org>...
> Since you didn't mention it: Did you make the box hollow?
> 
> Johannes.
> 
> 
> 
>


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From: =Bob
Subject: Re: help image maps & fog
Date: 28 Sep 1998 10:49:50
Message: <360f93fe.0@news.povray.org>
Sounds like another filter/transmit, fog/atmosphere problem. All I can do is 
show you a test-file which may show similar thing even though it is using 
halo.
//BEGIN TEST FILE
camera
{
  location  <0.0 , 3.0 ,-8.0>
  angle 33
  look_at   <0.0 , 3.0 , 0.0>
}

#declare TestHalo = sphere { 0, 2
 // pigment { color rgbft <1, 1, 1, 1.125, 0> }  // type A equalization: no 
b.g., fog t=.5
  pigment { color rgbft <1, 1, 1, 1.2, .125> }  // type B equalization: b.g. 
or not, fog t=0
 // pigment { color rgbft <1, 1, 1, 1, (1/3)> }  // type C equalization: b.g. 
or not, fog t=0
    halo {
      emitting
      spherical_mapping
      linear
      color_map {
        [ 0 color rgbt <1, 0, 0, 1> ]
        [ 1 color rgbt <1, 1, 0, 0> ]
      }
      samples 10
      scale 2
    }
    hollow
    no_shadow
  }

//  transmit .5 (only, no b.g.) for type A,
//  0 (.5 only with b.g.) for type B,
//  0 (.5 only with b.g.) for type C
fog {
    distance 50
    colour rgbft<.5, .5, .5, .5, .5>
    fog_type 2
    fog_offset 3
    fog_alt .25
    }

light_source
{
  0*x
  color red 1.0  green 1.0  blue 1.0
  looks_like{ object {TestHalo}}
  translate <0, 2.5, 4>
}

// comment out below to see without b.g. objects
///*
plane {z,10 pigment {rgb <.33,.66,.99>} hollow}  // a background object messes 
it up again
plane {y,0 pigment {rgb <.99,.33,.99>} hollow}  // a background object messes 
it up again
cone {-3*y,1,3*y,0 pigment {rgb<0,1,0>} translate <0,3,6> no_shadow}
//*/
//END OF TEST FILE

Message <01bdea3b$c8ad1bc0$6b43a8c2@wphnvffu>, Mick Hazelgrove  typed...
>
>Help
>
>I've being trying to put an image map of an insects wing in a scene with
>fog
>
>Where the box on which the image map is projected meets the fog it shows up
>and the background shows through the fog
>
>Does anyone know how to get round this - I've tried upping Max_Trace level
>but it has know effect.
>
>Hope someone knows the answer to this one
>
>Mick Hazelgrove

-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/POVring.html
=Bob


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From: Mick Hazelgrove
Subject: Re: help image maps & fog
Date: 28 Sep 1998 14:48:16
Message: <01bdeb08$2bca8400$9546a8c2@wphnvffu>
Thanks for the file 
I've tried to reproduce the test file in my own with no success.

If youve' the time or anyone else I'll post my file for you to play with

Mick Hazelgrove

=Bob <ver### [at] aolcom> wrote in article <360f93fe.0@news.povray.org>...
> Sounds like another filter/transmit, fog/atmosphere problem. All I can do
is 
> show you a test-file which may show similar thing even though it is using

> halo.


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From: Mick Hazelgrove
Subject: Re: help image maps & fog
Date: 28 Sep 1998 14:50:52
Message: <01bdeb08$88479420$9546a8c2@wphnvffu>
Dear Bob 
I've tried the ideas in your file on my pic with little success there is
some improvement but I can't get rid of the box.

If you or anyoneelse has the time I'll send you my file to play with

Mick Hazelgrove

=Bob <ver### [at] aolcom> wrote in article <360f93fe.0@news.povray.org>...
> Sounds like another filter/transmit, fog/atmosphere problem. All I can do
is 
> show you a test-file which may show similar thing even though it is using


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