Original sentence: In Front projection, light from the projector that travels through the one-way mirror and is not reflected towards the scene is “soaked up” by black velvet.In IntroVision, the black velvet is replaced by another Scotchlite screen that reflects the image back towards another Scotchlight screen placed before the performer.IntroVision was first used in 1980-81 during the filming of Outland to combine star Sean Connery with models of the Io mining colony.It was also used in Under Siege, Army of Darkness and The Fugitive, where it seemed to place Harrison Ford on top of a bus that was then rammed by a train.Thus, the same image appears from two different sources and lands on two different screens creating a “3D” effect
Edited sentence: A front projection composite photography system using a pair of perpendicular reflex screens to combine two projected scenes with a scene staged live before the camera in a single shot.IntroVision was first used in 1980-81 during the filming of Outland to combine star Sean Connery and other performers with models of the Io mining colony.. It was also used in the telefilm Inside the Third Reich to place actors portraying Adolf Hitler and Albert Speer in the long-destroyed Reichstag, as well as Under Siege, Army of Darkness and The Fugitive, where it seemed to place Harrison Ford on top of a bus that was then rammed by a train.It allows foreground, midground and background elements to be combined in-camera, such as sandwiching stage action (such as actors) between two projected elements, foreground and background.It utilizes a camera, two projectors, and respective associated three half-mirrored transparent beam-splitters