"Sam Bosma"@en . "Sam Bosma"@en . "Male"@en . . "Sam Bosma"@en . "\"Sam Bosma\" is an artist on Steven Universe. He specializes in background art/design. Outside the show, he does many abstract paintings."@en . "\"Sam Bosma\" is an artist on Steven Universe. He specializes in background art/design. Outside the show, he does many abstract paintings."@en . . . "Background Artist"@en .