Ronald Lionel Dias (February 15, 1937 – July 30, 2013) was an American animator and painter who began his career in 1956 after winning a stamp animation contest organized jointly by the U.S. Post Office, the U.S. Office of Education and Counsel of Chief State Schools' officers.[1] He contributed to films such as The Secret of NIMH, The Chipmunk Adventure and Who Framed Roger Rabbit. He died on July 30, 2013.[2]