Blind Illusion was a progressive thrash metal band from San Francisco, California. Formed in 1979 by lead guitarist and chief songwriter Marc Biedermann, the band had an extremely unstable lineup (Biedermann being the only constant member) and even went through a few stylistic changes in their time. Their only album was called The Sane Asylum.Bassist Les Claypool and guitarist Larry LaLonde went on to form the alternative metal band Primus.HistoryBlind Illusion was formed in 1979 by-the