What was the most important reason that J. R.R. Tolkien objected to original movie treatment of The Lord of the Rings written by Zimmerman? What are two other reasons he did not like the way Zimmerman was handling the story?

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artists need to create a realistic interpretation so that people in general can relate to the artwork. for a common people, an artist's impression gets increased only if he can create something which would look realistic. an abstract is difficult for a common people to understand whereas if a person can draw a girl with simple pencil sketch and if that looks like a real figure then the latter will be praised more than the former.