With the new features in After Effects CS6, you can easily add 3D text to moving camera footage with real depth, real perspective and real shadows. We shot a promo video a year ago in the Middle East, and added 3D text into the footage we shot with the Digislider. Back then we had to create the 3D text in Photoshop and import it into After Effects and use additional plugins to track the footage in order to place the text so it looked part of the footage.
Now you can do everything in After Effects CS6. Here is a great tutorial from Creative COW explaining how it's done.
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