In various versions of this work, the artist tested the multidimensionality of plane photographic representations. Each of them consists of six prints and shows the same motif of the urban landscape. The photos were taken by an artist driving a tram and always photographing the same building, changing the shutter speed each time. The illusion of recording movement on still frames was the result of manipulating time, but also the movement of the artist who was moving at that time. The implementation of the cycle was accompanied by theoretical considerations on the plane and spatiality of mechanical registration presented in the text entitled The theory of four-dimensional photography – empirical (photographic) verification (proving) of the invariance of the space-time interval (1972).