What makes Opel by Syd Barrett notable?

'Opel' holds significance as it provides insight into Barrett's creative process, featuring raw and experimental tracks that influenced the psychedelic rock scene. The album received a warm reception, with critics praising its authenticity, even though it did not achieve significant commercial success. Released in 1988, 'Opel' is a posthumous compilation of previously unreleased tracks from Syd Barrett’s solo career. This album arrived over a decade after his last official release, 'Barrett' (1970), showcasing the evolution of his sound during a tumultuous period marked by mental health struggles.