This is a cartoon though, significantly less adlibbing, everything has already been storyboarded and scripted out etc. Pixar's approach to making their movies

This is a cartoon though, significantly less adlibbing, everything has already been storyboarded and scripted out etc. Pixar's approach to making their movies is a fascinating highly iterative process going through many story boards and internal showings using simplistic graphics before proceeding to the final stage to produce a polished product. I wonder how Simpsons do it.