Four Artists Paint One Tree is an educational animation film made by Disney in 1958. It was originally a part of Disneyland's "An Adventure in Art" sub-series.
The scene short film opens with Walt Disney giving a short synopsis of the animation process. Walt explains exceptionally well how artists of such diverse backgrounds and preferences in style are able to collaborate on a Disney animation in such a way that is consistent in style across every character and every scene. Four animators at Disney, Marc Davis, Eyvind Earle, Joshua Meador, and Walt Peregoy, know how to collaborate on a project for Disney. They can use their individual strengths to create a project better together.
Although this was interesting, the most interest part came after this explanation. Walt reads the wise words of Robert Henri from the his book "The Art Spirit". Henri gives young artists the advice to not try and replicate someone else's style but to use their own natural impressions. Essentially "be yourself"!
To demonstrate the importance of individual style, the four illustrators at Disney set out to paint a tree. Although they are looking at the same tree, each artists creates something completely unique and different from the others. Each painting is so different because each artist attempts to display a different idea.
In the words of Henri, "The great painter has something to say. He does not paint men, landscapes, or furniture, but an idea."