In addition to wood and concrete, the other main material in the house is quarter-inch single-pane glass: No room is without a natural light source, whether from skylights, mitered corner windows, or clerestories, as in the old bedroom of the Kappes' son Finn. The paintings are by their other son, Ron. Tagged: Bedroom and Bed.  Photo 5 of 12 in Ray Kappe-Designed Multilevel House in Los Angeles