The white lines on the wall are confined to a single point, and the only variation comes from the angle of the floor. Naturally, this gives the illusion of a seamless space, but in fact the walls are carefully constructed, and the variation in the floor makes a more or less conspicuous difference. At the very extreme, the floor almost completely encloses the entire space around it, and, on the other side, a small but barely perceptible bump is made at the junction of the wall and the floor, like the missing piece of an endless jigsaw puzzle.