Complex sentence: His 2001 album, "The Unspeakable", featured unreleased music that he composed for the "Hellraiser 6" soundtrack, which was rejected for being considered "too scary for the movie".
Split into simpler sentences: His 2001 album, "The Unspeakable", featured unreleased music that he composed for the "Hellraiser 6" soundtrack. The material was rejected after being considered "too scary for the movie".