I finally semi-understand why certain writers are uncredited in films thanks to the inside peek we wannabes get at Craig Mazin's & Ted Elliott's website, www.artfulwriter.com.
According to various pros, the crediting process is a complicated, sometimes unfair, attempt to weight the contributions of everyone who worked on a screenplay in order to decide whose name goes on the screen.
But how is that voices can go uncredited in animation? Why is Kathleen Turner not credited with the voice of the gravity defying & dangerously over endowed vixen in Who Framed Roger Rabbit? Can anyone tell me that? Is it based on number of lines recorded that actually wound up in the film? I need some animation education.