Waking Life
The way that I think they made the animation so well would be by adding a lot of shadows to the characters to give the illusion of the animation moving. Maybe by adding different shadows at different points of the movie you can create the illusion of them moving like real people. I think it is to the lighting that is involved with the movie. Shadows and the lighting will have a lot to do with it. If the shadows are where the animators want them to be then the lights are placed in the correct spot you will think that the animations are moving when the are really only doing one or two basic things. If the animators place a shadow of the main character holding his arm up with something in his hand then add the same shadow in a different spot. Once you add the same shadow in a different spot you can add colorful light and the light will bounce off the shadows to give the affect of the character moving.
I think that the reason why the animators decided to do this film as an animated one was because it would be different from the other animated films. The reason why it would be different is because of the way the animation is set up. The animation includes shadows and light, which all animations include but it is different because of the way it uses the shadows and lights. This film uses the shadow and lights as an element to help them make the characters move. Other films uses shadows and light to make the animations seem more real feel which this films characters already have that real person appeal.