four eyes might actually benefit the owner. with 2 eyes, you can cover 360 degrees without stereo vision, or half that with stereo vision. two pairs of eyes sh

four eyes might actually benefit the owner. with 2 eyes, you can cover 360 degrees without stereo vision, or half that with stereo vision. two pairs of eyes should give the owner superior awareness of its surroundings. six legs... the na'vi didn't have 6 limbs. they're an exception. that should have been continued, to maybe 4 arms, like the tree monkeys did. showing the use of 6 legs isn't a problem. enough things on earth already do that. humanoids with 4 legs might have worked... they'd have looked less human though. also, i can't imagine why a 4-legged humanoid would ride a 6-legged horse. Kurzweil pointed out that this film is meant to make money, so 4 legs wouldn't have worked so well. humanoids with 4 arms, that's already difficult from a practical standpoint. what does a 4-armed humanoid use its arms for? the bow and arrow for a 4-armed creature might just be too hard to extrapolate.