LATimes: Rewriting the Script. "All of the scenes in "The Polar Express" will be shot with digital cameras in front of a blank screen, with sets to be filled in later by computers. The actors will be covered in motion-capture sensors so that each move of an arm, each flicker of an eyelid and each wrinkle of a lip will be stored on a computer and used as guide for the digital animators who will create the actual movie footage."