From ILM’s official Youtube channel:
The story of “Pacific Rim” is told on an epic scale, where 250-foot tall combat mechs battle similarly sized giant alien monsters in the ocean off of the coast of major cities, and when that fails, in the cities themselves. Scale is a recurring theme throughout the film, where a large threat is countered with a large response, making humans tiny in this new out scale world.
ILM’s visual effects team discusses the design, effects and animation of these incredible machines in this video. We hope you enjoy it.