The Hollywood Reporter were on hand at this year's SIGGRAPH convention, and got a few words with Pixar director Pete Docter about his latest project, Inside Out. Set inside a young girl's mind and showing her emotions as actual characters, Docter described the project as "one of the most challenging stories I’ve ever had to put together."
The slightly updated synopsis THR provides says that the story "takes place inside the mind of an 11-year-old girl, and emotions such as anger, sadness, disgust and joy are the main characters."
Docter talked about the film's two simultaneous stories: outside and inside of the girl's mind: "One story is hard enough,” he said. “This is two stories that need to talk to each other." Inside Out is being scripted by Toy Story 3 and Star Wars: Episode VII scribe, Michael Arndt, and produced by Jonas Rivera (Up), so the story will presumably be as well accomplished as Up was. Up story supervisor Ronnie del Carmen is also co-directing.
The Monsters, Inc. and Up director also spoke about the actual animation of the film, saying:
"The characters are created with this energy because we are trying to represent what emotions would look like. They are made up of particles that actually move. Instead of being skin and solid, it is a massive collection of energy. It’s a lot of fun and really takes advantage of what animation can do."