In four movements, the Altered States video starts with vintage rock from Jefferson Airplane, set to McKay's early 60's pulsating sensory overload style. The 70's evolve into a tweaky sound track by Knox Bronson, electronic culture mastermind, with scenes from McKay's world travels in a highly abstracted form. The 80's movement travels into pure geometric and color abstractions, with an uplifting electronic/acoustic soundtrack by Dean Evenson. McKay’s 90's movement goes deep into fantastic liquid color landscapes with a dark, electronic music voyage crafted in collaboration with McKay by Greg Jalbert. This video captures McKay's main installation piece at a retrospective of four decades of his work at the San Francisco Museum of Modern Art, February-May 1999.