The entire movie got recreated using toys, plush figures, and real-life people. They even used clay to replicate facial expressions as good as possible.
Surprisingly, the project even received endorsement from Disney!
With a short demo of the film peaking out last year, the full release sees a culmination of around 8 years of work. If you were, at this point, wondering what Disney had to say about it (specifically their legal department) then prepare to be amazed again! Yes, they’ve actually both endorsed and blessed this project!
Source: eTeknix