Eric CHAPUZOT wrote:

> ... with a blue eye crying on the top left.

the base and stem look a little odd. Like there is no thickness to it. are
you using any IOR? or is there even any thickness to the object? photons
would be cool too :)

I suggest you look into a handy program called pngcrush, used for optimally
compressing PNG images.
http://sourceforge.net/project/showfiles.php?group_id=1689

there are precompiled Windows executables if that is your platform.
otherwise, there are source code versions.

good luck! 

-r

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