Erich Mendelsohn was one of the earliest architects to make use of the camera during the 1920s avant garde. The influence of his camerawork on his own design process can be traced via his drawings as well as in his collaboration with the photographer Arthur Koester. Ludwig Mies van der Rohe is not known to have used a camera but when designing large constructions relied on photo-montage (which he had learnt from the avant garde filmmaker Hans Richter and other Berlin graphic artists). Rolf Sachsse describes these different uses of the medium within the architectural design process in the 1920s and attempts to trace the tradition that followed, ending with the use of computer animation and video techniques as a means of both advertising architecture and influencing ideas of construction and shape. Sachsse trained and worked as an architectural and advertising photographer. Professor Sachsse is Dean of the Faculty of Design at the Niederrhein University of Applied Sciences at Krefeld.