Walt Disney was known for his animated films, so even when he tried his hand at making live action films there were always animated elements in them. Until 1950's Treasure Island, that is. Walt hadn't set out to make a live action film, but after World War 2, the United Kingdom would not allow foreign companies to send revenue out of the country. The only way Walt Disney Productions could get its millions of pounds of royalties was to produce films inside the country that could be "exported". So Treasure Island went into production.
Walt instantly gained an appreciation for live action and put together a full slate of productions that filmed at locations around the world, though eventually mostly in Burbank at the Disney Studios. The experience gained from dealing with real sets and environments would eventually prove useful in Anaheim during the construction of DISNEYLAND.