Back in 2001, with the release of Peter Jackson's fantasy film "Lord of the Rings: The Fellowship of the Ring," the filmmakers faced a unique visual challenge. Multiple characters in the film were hobbits, a species of humanoids that stand about three feet, and they had to regularly interact with human characters double their height. Jackson had cast the 5' 6" Elijah Wood as hobbit Frodo Baggins, and had to use several clever techniques to achieve the height disparity between he and the 5'...

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