No, No, No...not the film...read the book.
The dwafts made such lovely sweeling deep down earth in caves... Moria and all... there is nothing about all those magnificance you can get from that flm, which by the way cannot ever represent the actually charactors in the book written by JRR Tolkien.
Please read the book, the visualiisation will help you get ideas about the lanscape in the stories...
Hmmm.... I hear you, but one thing about me is that I don't like adapting from other original works, I like creating my own stuffs from imagination, even though it might pale in comparison to the brilliant works of other creatives, at least, I have confidence that my artworks are my creation and not some knockoff.
but I will try to find time to read the book, as you suggested, even though I'm also a writer the only book I've faithfully read are the harry potter series lol