Where The Wild Things Are by Glen Keane and John Lasseter!
Sébastien Durand has stumbled on YouTube on the historical test based on Where the Wild Things Are that was John Lasseter's first foray into computer animation in 1982, when he was still at Disney. The traditional animation is the work of Glen Keane. I never thought I would see this test . To say that I was very excited when I received this link is an understatment.