As far as I know, is Disney (Studios) pushing the envelope in every film they produce. They allways try to come up with a new technique, with almost every film. For example the "Multyplane Camera" in Snow White, the "Deep Canvas"-Method in Tarzan, the Snow animation in Frozen or the Hair in Tangled/Brave.
Has there been other technical development?
As far as I know, was the most progress made in the Disney Renaissance (Traditional Animation) or in recent years (3D Animation).
But what exactely(techniques) did they came up with?
Which methods did they invent?