By that I mean that someone who never read Lovecraft would see the film and feel all the dread while not getting confused with the way the story translated into the big screen.
For me, The Case Of Charles Dexter Ward is perhaps his best tale that could be converted into a great movie. His stories are too complex and rely too much on our imagination to convey all the dread and horror of the tales but Case does appear to be quite straightforward in terms of narrative and it would go down well as a faithful movie.
What are your Lovecraft stories that you think realistically would make a great movie?