Director: Salvatore Samperi
Cinematography: Giuseppe Rotunno
Film Editor: Sergio Montanari
Production Design: Uberto Bertacca
Matte painting: Uncredited.
I suspect the paintings were done by Emilio Ruiz. He worked some years early with production designer Uberto Bertacca on another Italian film “Ci risiamo, vero Provvidenza?” (1973) Aka “Here We Go Again, Eh Providence?” On that film Emilio was credited as decorator and executed several glass paintings. It is very likely that Bertacca used again Emilio´s tricks on this film.
I think the Coca Cola bottle and the upper part of the wood turret is a painting or foreground miniature. There is no shadow of the Bottle