The doom metal band Trouble introduced acid rock elements on their 1990 self-titled album, which became even more prominent on 1992's Manic Frustration. Similarly, the British doom metal band Cathedral increasingly moved toward a psychedelic/stoner sound over the course of their first three releases, culminating in the critically acclaimed 1993 album The Ethereal Mirror. During this same period, heavy metal band White Zombie achieved multi-platinum success with their two major label albums, significantly expanding the heavy music audience with their groove-based, sample-laden "psychedelic horror" sound.
