Artists like The Mars Volta

Puscifer is an American rock group formed in Los Angeles by Maynard James Keenan, lead singer of Tool and A Perfect Circle. Initially Keenan was the only permanent member and he considered the project to be his "creative subconscious". Later, frequent collaborators Mat Mitchell and Carina Round became permanent members.

Lunatic Soul is a progressive rock side-project founded by Riverside vocalist and bass guitarist Mariusz Duda in 2008. Originally conceived to allow him to explore genres outside of rock, the project was described by Duda in 2014 as progressive, ambient, oriental, and electronic. Lunatic Soul has released eight albums to date. The most recent, The World Under Unsun, came out in October 2025.