 Sets for Dagobah were built five feet above the stage floor, allowing puppeteers to crawl underneath and hold up the Yoda puppet.The setup presented communication problems for Frank Oz, who portrayed Yoda, as he was underneath the stage and unable to hear the crew and Mark Hamill above.Hamill later expressed his dismay at being the only human character on set for months; he felt like a trivial element on a set of animals, machines, and moving props.