Last one I saw required the red/blue glasses (it was eigther spy kids 3d or shark bot & lava girl).
Clash of the titans. It was neat & didn't need red/glue glasses & you could even watch it w/o the glasses. But...
The 3D was 3D, but it was 3D like Vegas does 3D: with flat plane over flat plains @ a distance. There was no depth to a plain. IE a ball wasn't round, it was flat on a separate plane. Is it safe to assume other 3D movies are the same (alice, etc).
But it was still neat & @ 10pm me & the wife were the only ones there so it was nice we could comment on the movie too. :)