I'm always looking for impressive free apps to show what the iPad can accomplish, and I've done that this week with 123D Catch from AutoDesk.
This iPad app (iPad 2 and new iPad only) allows you to use the iPad camera to photograph any object from a number of angles and elevations. Then the app sends your images up to an AutoDesk server where the object is rendered as a 3D file. You can even create 3D files for large objects, like a building, by moving parallel to it to allow the rendering to display the changing perspectives. Even people can be rendered in 3D if they don't move during the imaging sequence. It's all covered in the included help files and videos.
This is pretty amazing on any computer, and even more impressive on a t
