 Only the songs "Echoes pt. 1 and 2", "A Saucerful of Secrets" and  "One of These Days Im Going to Cut You Into Little Pieces" were  actually filmed in Pompeii. The songs "Careful With That Axe  Eugene", "Set the Controls For the Heart of the Sun", and  "Mademoiselle Nobs" were actually filmed in a studio in Paris, where  extra shooting took place for the bluescreen shots in the Pompeii  performances. This explains the extra lighting rig and disappearance  of Richard Wright (II) (qv)s beard in the Paris