What you are seeing is not photoshop, but infact the very clever photography of Georges Rousse, a French artist and photographer born in 1947 in Paris which is also where he currently lives and works. He studied professional photography and printing techniques and went on to open his own studio which is dedicated to architectural photography.
His passion has lead him to devote his entire life to architectural photography. His unique approach of blending painting and photography together has allowed him to create these truly unique images that alter and shift the relationship between painting and space. It all comes down to perspective, as can seen by the image above and the image below which looks completely different when viewed from another angle.