The room is constructed so that when viewed from the front it appears as a normal parallelepiped-shaped room, with two parallel vertical side walls, a back wall, and a ceiling and floor parallel to the horizon. Actually, the floor plan of the room has the shape of a trapezoid, the walls are divergent, and the floor and ceiling are inclined. The inclinations and proportions in the size of the elements placed at different depths are calculated taking into account the rules of perspective.