The short landscape films take the ideas from some of the paintings a stage further in that they involve a fixed but actual duration. In shooting the original footage, strict rules were observed; the camera was mounted on a tripod and could not pan by turning horizontally. Vertical movement was allowed, as was the adjustment of zoom to vary depth. The permitted adjustments could only be made between shots, not while the camera was running. Notes of events were made during the filming. In the editing process the image was cut to leave narrow vertical or horizontal strips to concentrate vision and text added to indicate peripheral events.