a) A wipe wherein the screen is divided into square areas, each of which can contain the video from either bus. Initially, each square contains the first bus video, and as the wipe develops, one or more squares switch to the opposite bus video until, at the completion of the wipe, all squares contain the second bus video. b) A type of wipe comprised of multiple boxes (a matrix of boxes) which turn on various parts of the “B” video during the course of a transition from the “A” video, until all the boxes have turned on the scene is all “B” video. This operates in either direction.