[One shot in particular that I really, really wanted to get, we ended up nailing in the previs.] Matt Reeves (Director), on the Cloverfield DVD Behind the Scenes

Hotel For Dogs

The Third Floor was brought on during the early stages of the film to help visualize sequences in a conceptual form. Because of the head start, the artists had an opportunity to suggest ideas that ultimately inspired the final product. Previsualization helped push the movie forward throughout production.