On Wed, 12 Nov 2003 07:22:16 EST, "gyanez" <gya### [at] ncrrcom> wrote:

>I also want to make the ball see-through...transparent...I was told to use
>rgbft/transmit function...in my example I commented it out.  Is the
>use/placement of it in my code provided correct or not?

Yes that is correct. You can also use 
color  rgbt <1,1,1,1> and color  rgbft <1,1,1,0,1> 

Note that filter and transmit should add up to one (1) unless you want strange
results.
To see what is happening put something behind the ball and raise the light
source. For instance.
#include "finish.inc"
#include "textures.inc"
#include "colors.inc"
#include "glass.inc"
#include "stones.inc"

camera {   // Front
        location <0,2,-10>
        look_at <0,0,1>
} 


/*
camera {   // Side
        location <10,2,-10>
        look_at <0,0,1>
}
*/

light_source { <0,5,-2> color White}

  plane { <0, 1, 0>, -1

    pigment {
      checker
      color rgb 1
      color blue 1
      scale 0.5
    }
    finish{
      diffuse 0.8
      ambient 0.1
    }

  }

  

object {
sphere {
  <0, 1, 2>, 2
//no_image         // Un comment to view without the sphere
photons{
  target
  reflection on
  refraction on
}

  pigment {
  color  rgbft <1,0,0,1,0> 
//        Col_Glass_Clear
      }
  finish{ reflection{0,1 fresnel on}}
    interior {ior 1.5}
}
}

  cone { <0, 7, 0>, 0.0, <0, 0, 0>, 1.0 
  
  translate <1,-1,10>
  
texture {
  pigment { colour rgb<1,1,1>         
  }
  finish {           // (---surface finish---)
    ambient 0.2
    specular 0.6     // shiny
  }
}
  
  } 

Regards
        Stephen

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