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From t.degroot@inter.nl.net:
Unfortunately, the originality of the concept is not immediately obvious in the image. One has to read the explanation to know what is missing. A pity, because the image is carefully made.

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From s.day@uel.ac.uk:
Nice flame effect.

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From billpragnell@hotmail.com:
Nice caustics!

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From file:
Original way of looking at topic.  Good moody lighting.  Magnifying glass is a nifty touch.  Hard to say too much in addition without using author's missing glyph.  :o) 
Notable for lighting, originality