In 1934's Babes in Toyland Seawright did a stop motion animation sequence for the toy soldiers marching to attack the Bogeymen.
Credited as head of the Process Department in 1937, some of Seawright's most famous work was in Topper Takes a Trip[2] and One Million B.C.
[3] During World War II, Seawright was commissioned a Major in the US Army Air Forces' First Motion Picture Unit where he provided special effects for many military training films and Memphis Belle: A Story of a Flying Fortress.
He left Hal Roach after returning from the Army, eventually working for Eagle-Lion Films providing special effects for Phil Karlson's The Big Cat and Port of New York.
Seawright entered a partnership with former Warner Brothers cartoon writer Dave Monahan as his director of photography.