Back Projection is a photographic technique whereby live action is filmed in front of a transparent screen onto which background action is projected.
Back projection was often used to provide the special effect of motion in vehicles during dialogue scenes. It has since become outmoded and replaced by bluescreen (or greenscreen) processing and traveling mattes. It’s also known as rear projection or process photography (or shot). It contrasts with a matte shot.« Back to Glossary Index