[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

Thx 1138: The George Lucas Directors Cut

In 2002, The Third Floor team was formed to enhance George Lucas’ first feature film, THX 1138. The team previsualized the changes, planned the reshoots, and delivered half of the final visual effects. Lucas trusted the team to create all the creature shots for the Director’s Cut. This involved removing the original actors and replacing them with animated creatures that would appear to be attacking Robert Duvall.