in news:3c7bb795@news.povray.org Mick Hazelgrove wrote:

> Any snippets of code that will get me moving in the right direction
> would be very gratefully received. 


Absorbtion and emission colour shoud be opposite.

---%<------%<---
#version 3.5;
global_settings {assumed_gamma 1.0}
camera {
  location  <0.0, 0.0, -3.0>
  look_at   <0.0, 0.0,  0.0>
}
light_source {
  <500,500, -500>
  rgb <1, 1, 1> 
}
plane {
  -z,0
  pigment {checker color rgb 1 color rgb 0}
}
sphere {
  0.0, 1
  hollow
  texture {
    pigment{rgbt 1}
    finish {ambient 0 diffuse 0}
  }
  interior {
    media {
      method 3
      intervals 2
      samples 1,1 
      emission rgb <1,1,0>
      absorption rgb <0,0,1>
      density {rgb 1}
    }
  }
}
---%<------%<---

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