A very important innovation and invention that facilitated the animation industry was the multi-plane camera, created by Walt Disney himself. This machine was patented on May 1, 1940. What this did was stack planes of glass on top of each other, each with a different drawn element of the animation. These elements could include backgrounds, foregrounds, or characters. This made it so certain parts of the drawing would not need to be done over and over again, thus saving time and energy.