The man for the job was Roger Thomas, the executive vice president of design responsible for the interiors of the Wynn and Encore hotels in Las Vegas.

Sunbrella and Sharpies: Design secrets from Oscar's green room - Oscar's green room - Furniture

In an allusion to what he calls "the smoke and mirrors" of Hollywood filmmaking, he built a hedge-lined garden room on the theater's loading dock. It adjoins the lounge, pictured above, which is an homage to 1930s Hollywood sets with lambskin tiled walls and a ceiling of stretched black fabric.

The ceiling and floor lights are softened with gels in a color known in the industry as Cosmetic Peach, Thomas says, "to make sure people look glamorous." On the walls? A 19th-century Chinese coromandel screen. And framed mirrors. 

Read More