And my "most stolen" images (i.e. those that were hotlinked heavily on public forums, call them "the most popular" too) were those that had somehow a reference to "trippy" or sometimes "cool" in their descriptions... I've changed my naming techniques since. Another band that I know that has used a fractal in a cover art is Killing Joke, in the "Millenium" single. Much probably a Fractint image.