Hiya! The image consists of three objects : The red sphere in the 
middle, a white disc with a fancy-pants normal pattern* (that somebody 
else used a short while ago so I stole it like the thief I am), and a 
large black sphere containing the disc and the red dot. The disc and the 
sphere both have reflection 1.0, and I set max_trace_level to 50. Any 
higher than that and the rendering would have taken too long. I could 
probably have gotten away with a lower value though...

Other than that, I used a touch of radiosity, default values except that 
I turned normals on, and two white lightsources.

*normal{
    average
    normal_map{
     [0.5 checker translate <0.5, 0, 0.5>]
     [0.5 checker translate <0.5, 0, 0> rotate <0,45,0> scale sqrt(2)]
    }
   }

A square rendering is probably a good idea. I'll get right to it.

Pogo

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