Rauschenbach's first published work outside rocketry, "Spatial composition in old Russian art" (1975) and later "Spatial composition in painting" (1980, including world art) were dedicated to mathematical foundations of perspective in art. His mathematics prove the impossibility of rendering correct spatial perspective on a flat sheet. His studies of the difference between the material artwork and human perception of it indicated that perception differs with the subject of an image. Great artists deliberately distorted perspective, and the degree of distortion depends on the subject.