3D movies are all the rage these days. You can find them in theaters, and now you can even find them on DVD. If you’re looking to buy a 3D movie, there are a few things you need to know.

First of all, not all DVDs are created equal. Some are simply 2D movies that have been converted to 3D, while others are true 3D movies that were filmed in three dimensions. If you’re looking for the full 3D experience, you’ll need to make sure you buy a DVD that was filmed in 3D.

Second of all, not all 3D …