 The process, that was used to create the wild, kaleidoscopic images  Bowman experiences going through the Stargate, is known as "Slitscan  photography". It was developed by Douglas Trumbull (later special  effects supervisor on Close Encounters of the Third Kind [1977]) and  involved moving the camera rapidly past different pieces of lighted  artwork, with the camera shutter held open to allow for a streaking  effect. The overall effect gave the audience the sense of plunging  into the infinite.