While planning a third part of his "Portrait Trilogy", Glass turned to smaller music theatre projects such as the non-narrative "Madrigal Opera" (for six voices and violin and viola, 1980), and "The Photographer", a biographic study on the photographer Eadweard Muybridge (1982). Glass also continued to write for the orchestra with the score of "Koyaanisqatsi" (Godfrey Reggio, 1981–1982). Some pieces which were not used in the film (such as "Façades") eventually appeared on the album "Glassworks" (1982, CBS Records), which brought Glass's music to a wider public.