Ok, on to my next issue..

I have my shapes now, in glass, and I'm looking to have them on a completely 
black background.  Of course they barely show up.

I remember dimly a trick to give them more reflectance, like in the real 
world where they are always surrounded by things to reflect.. But I don't 
remember what it was.

Object values:

finish  { ior 2.4
    specular 0.7
    phong 0.95
  phong_size 80
  roughness 0.015
 ambient 0
  diffuse 0
 reflection { 0.2, 1.0, fresnel on}
 conserve_energy
 }

Interior { ior 2.4
                caustics 0.1
                dispersion 1.05
                dispersion_samples 7
                fade_distance 1.0
              fade_power 2
              fade_color <0,0,0>
             }

The colors have a 0.99 filter value at the moment.

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