They use mostly proprietary tools for modeling and animation. But yeah, Maya is their framework that they base it all around. I've got a bunch of friends there. Looks pretty funny. I always thought Aardman swore he wouldn't do it. I liked the 'floater' scene but let's hope it's not a case of all the best moments crammed into the trailer.
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http://www.aardman.com/html/newcomms.asp?type=html
Looks like a fun movie
plot: