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From tom@tomandlu.co.uk:
Nice abstract.

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From topher@csh.rit.edu:
Maybe a bit more detail on the balls would have helped? Like if they were
planets, or lenses
into the lives of other people?

BTW, you can increase the amount of recursion used with the max_trace_level in
the 
global_settings to get more reflections if you wanted.

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From p_chan@shaw.ca:
Another simple yet artisically elegant scene.  The 
reflections you've created look very good.