Ralph McQuarrie, an artist whose paintings of a gold-plated robot in an otherworldly desert and an intergalactic sword duel between a scraggly youth and a black-masked villain helped persuade film executives to gamble on a young director named George Lucas and his visionary story, “Star Wars,” died March 3 at his home in Berkeley, Calif. He was 82.
He had complications from Parkinson’s disease, said John Scoleri, co-author of a book of Mr. McQuarrie’s art.

