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From stephenhasmail@yahoo.com:
Very nice image.  Could have used an area light effect, though (huge groups of
sparks wouldn't cast sharp shadows like that).

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From StephenF@whoever.com:
The metal parts look good, as do the effects.  I'm not 
sure what you were going for with the black and white 
grid along the top, but I think it detracts from the scene 
overall.

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From dooby@breathemail.net:
I see what you mean about the halo effect. Nice!

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From tom@tomandlu.co.uk:
Doesn't really work for me.