In 1975, Pagani composed the music and designed the stage set for Megalopolis a total-opera based on Medioevo Prossimo Venturo (The near future middleages) with a libretto by Roberto Vacca. In order to represent the congestion and collapse of the Energy Systems as described by the Italian futurologist, Pagani proceeded to clone on thousands of images of modern civilization using the first two Rank Xerox colour duplicators installed in France and in Italy. The "xerographies" assembled on large plates were photographed, projected and animated in Multimage shows on giant screens.