Paul Detlefsen was born in Copenhagen , Denmark . He was the son of a medical doctor . He studied at the School of the Art Institute of Chicago before moving to Hollywood to build his reputation as a cartoonist . After not succeeding as an animator , he produced backdrops for films . He was nominated at the 17th Academy Awards , along with coworkers John Crouse and Nathan Levinson , for their work on the 1944 film '' The Adventures of Mark Twain '' . The only other films Detlefsen is credited for are '' The Horn Blows at Midnight '' ( 1945 ) , '' Escape in the Desert '' ( 1945 ) , and '' Shadow of a Woman '' ( 1946 ) , but he spent 20 years at Warner Brothers Studios , eventually rising to be in charge of the art department that created matte backdrops
17th Academy Awards
17th Academy Awards
Paul Detlefsen