Showbiz is famous for siblings — the Coen brothers, the Marx Brothers, the Jackson 5, Warner Bros — but Bill and Turner Ross, have been gaining momentum with feature films like ”Nose Bleed and Empty Pockets,” and have created a unique format with Gasoline Rainbow: semi-scripted narrative with a documentary style. Speaking to Westdoc on our latest episode published today, they discussed sharing the director’s chair, working with five, first-time actors, a long prep and a short shooting schedule, and capturing acceptable audio on the fly.