Its usually not done right, using 30fps instead of the typical 48 to 60 which gives people headaches and nausea which is done because its cheaper. It's also used in the worst of movies now, like the Conan the barbarian remake coming soon. Looks like an awful movie covered up by 3D. I used to love 3D, and still do if it's done the right way. But these noobs directing nowadays and not using the right hardware screw it up. They use a split screen arthroscopic image at 28fps instead of a full Anisotropic 3D filtering at 60fps or even 48 (like Avatar) and you can totally see the difference.What's your problem with 3D? I dig it! Kinda glad it came back!