Bedroom and Bed 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.  Modern Bedroom Ideas  by Matthew Keeshin from Ray Kappe-Designed Multilevel House in Los Angeles