I went to an exhibit on Avatar recently.
They did their best to approach their designs from a scientific perspective. Like, how would the different atmosphere and gravity affect life on Pandora. They apparently even made a manual for how to assemble one of those walker things the humans had.
While the story left something to be desired, I can appreciate their approach to the environment and the visual details.
--
Proud member of the Global Defence Force.
http://img.imgcake.com/AlecTrevylan006/AceKilljoyShieldpngyp.png