Blind Illusion is an American progressive thrash metal band from Richmond, California. The band’s original line-up formed in 1978 by lead guitarist and songwriter Mark Biedermann. Since Blind Illusion’s inception the band has had several line-up changes, with Biedermann remaining the only constant member. Blind Illusion is also notable for featuring Les Claypool and Larry LaLonde, both later of Primus, who performed bass and guitar respectively on their 1988 debut album The Sane Asylum.
After a 20-year hiatus, Biedermann reformed Blind Illusion in 2009, and they have since released two more albums: Demon Master and Wrath of the Gods. They also released an EP in February 2019, titled 2018, which also includes remakes of some of their older songs.