It can be frustrating to look for stuff on iStock, but sometimes you find the perfect piece, like the amazing background art I used in this “album cover” for Idolatry, which is an amazingly reminiscent of both 1970s prog-rock album covers and the endless-rainbow-guitar-neck interface of Guitar Hero and Rock Band (both originally designed by Harmonix).
The lyre/axe graphic on the back is a salute to the original rock messiah, Orpheus.