Forget the interaction, how did they do the environment?

Saw the following TED talk on "Milo":
http://www.youtube.com/watch?v=Uieh3RfkCng

While I find the idea fascinating, I'd personally like to know how they generated the environments that Milo was walking around in. Of course I'd also be interested to see if "Kate" is really more feminine, or just a female Milo.

Anyone know who I have to send my resume to in order to get to work on the project? :-)