Stanton wanted a movie that celebrates Dory's disability and challenges as a superpower.
The cinematographers made sure that the audience stuck with Dory throughout the film and were constantly experiencing new adventures as she was. For example, there's a scene where Dory is dropped into a tank. The way the film is shot, the viewer is with Dory in the tank, versus panning away and showing that scene from afar.
Humans were de-emphasized as much as possible to keep the story to Dory. This was done by making them silhouettes or using other techniques.
The scene where Dory is first placed into the Marine Life Institute took 146 takes, 13 months, and 18 artists and animators involved to render and complete.
The storyboarding process on Finding Dory lasted for approximately three and a half years.
A key difference between Finding Nemo and Finding Dory are the types of struggles the main character faces. Both have external and internal problems, but Dory's internal one is a lot more personal as she deals with her short-term memory issue.
You won't see much of today's world as the movie only takes a place a year after Finding Nemo.
Stanton wants the movie to feel like you're being told a story about someone you know really well.
The film made a point to focus more on the mother and daughter relationships aspect between Dory and her mother.
This film has more female characters than Finding Nemo. The reason? More female writers.