Hourglass Corral by DECA Architecture - Dwell Custom shutters can close off the skylights. "It's like an apparatus. It's more industrial design than architectural design. But it's a very important: It controls the natural light, it controls the temperature," says Vaitsos. "It's central to the actual concept of the house." Adds Loperena, "Yes, because it's the center of the Voronoi."