Quote: "Look at the guy who made avatar, I heard he used a crappy labtop!"
Dont know where you heard that, usually takes a render farm to produce these, do you have any idea how much processing is in one frame for these scenes at the kind of resolution required.
Take a look at the mile long credits for 3d production, what guy in particular?
$ 300 million U.S. dollars movie costs for computer generated animated special effects and principal photography
$ 200 million U.S. dollars for promotion advertising and distribution in multiplexes theaters cineplexes
$ 500 million U.S. dollars grand total film movie production budget
That crappy laptop sure did cost a lot.
Production video from Pirates of the carribean: