Disney has seen technological innovations that have impacted its films and profits over time. Starting with animation in the 1930s, Disney introduced synchronized sound in 1929 and the first full-length animated film in 1937. In the 1970s, Disney benefited from new motion control cameras in Star Wars. Disney also pioneered computer animation through Pixar films starting in 1995. Today, Disney uses advanced rendering and snow simulation software to create realistic effects. Disney has also expanded through theme parks, cruises, streaming services and merchandise to reach large audiences and generate substantial profits over many decades.