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From tom@tomandlu.co.uk:
Modelling and textures need work. Rather simple.

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From matt@alledora.co.uk:
Hmm, a world in a donut. Mmm... donut...
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From topher@csh.rit.edu:
Yah, you do need a bit more detail and exactly what you are trying to
achieve...

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From p_chan@shaw.ca:
The scene could use more work to make it better.  A few 
things I would like to see added are some land masses 
on the planet and possibly some mini-worlds inside the 
ring to emphasize the "Worlds Within Worlds" theme.  
The background looks nice though.