Ray Harryhausen moved from his native England to Los Angeles as a child. Being inspired by the original King Kong (1933), he made various short subject stop motion films. After WWII, he worked on the Oscar winning Mighty Joe Young (1949) and paved his way to create decades of special effects oriented movies with his own flavor! The 7th Voyage of Sinbad (1958) and Jason and the Argonauts (1963) are his notable start up films. His unique way of working with light and rear projection gave live action actors a new challenge to interact with special effects shots.
These two videos are very cool to watch and admire his work!