An infinite horizon line and the image of continuous waves... Experimentation with the vertical displacement of the image of a 35 mm film. 35mm film has four perforations per image. If the perforations are offset from the projector window, the image is split in two on the screen: for example, in a face image, the eyes are at the bottom and the mouth is at the top; The image has two displaced parts. To avoid this mistake, this multi-image movie uses collage. The filmmaker assembles an image by perforation (the normal technique is an image by 4 perforations). Therefore, there is never a vertical shift in the projected image.