Hoffman was the uncredited special effects supervisor for D.W. Griffith's THE BIRTH OF A NATION (1915). His only other credit is for the special visual effects for the A-bomb sequence in WAR OF THE WORLDS (1953).  Special Award - Special Effects 1953: WAR OF THE WORLDS [No credit listed, but film credits Jan Domela, Walter Hoffman, Gordon Jennings, Irmin Roberts & W. Wallace Kelley (visual effects) and Paul K. Lerpae & Harry Lindgren (sound effects).] 1951 thru 1953 Special Effects classified as an "other" Award (not necessarily given each year) hence, no nominations. 1 Special Award