They used Maya for the modeling and their own version of motion capture for many of the animations. The new issue of Cinefex has a good article on it and there is to be a "making of..." book out this month some time around the 21st. Technicaly it will be an amazing movie I just hope the story is half as good as the visuals. There is also a full page photo of the lead actress AKI in the June 29/ July 6 issue of Entertainment Weekly (Spiderman cover) page 37. It's a new photo I haven't seen anywhere else. AKI may just the first virtual supermodel.