This is a flat wall. The beauty of this mural is that it is the exact view that would be seen behind this building if their were a window there. The Honey Hut hugs the coast of Lake Erie, on a higher bluff. The “dots” on the beach are people. Shades of white and gray create the illusion that the window is recessed. I have left a piece of the real floor at lower left so you can see the illusion, where the floor appears to reflect on the wall.