There have been at least eight distinct bands called Illusion:

Illusion (1):

Illusion - a British progressive-rock band formed in 1977. Illusion were intended to be a reunion of the original line-up of Renaissance (whose second album was titled Illusion). In 1977 John Hawken (keyboards), Louis Cennamo (bass), Jane Relf (vocals), Jim McCarty (vocals, acoustic guitar and percussion), John Knightsbridge (guitars) and Eddie McNeill (drums) (mostly former members of the original incarnation of Renaissance, whose second album was titled Illusion). Keith Relf was to have been a member, but died before the band could record. They released two albums, Out of the Mist (1977) and Illusion…