The film was shot over four years during and around Al Pacino's filming schedule, also while he was not working on any major film projects. This is visible during the film because he is seen growing a beard and hair cut for the film Carlito's Way (1993) as one example.
For the final battle scene, Al Pacino literally had no money to shoot the scene and didn't know where to shoot it. Director Michael Mann, who was directing him in Heat at the time, volunteered some of his crew to shoot the final battle scene which was shot all in one day.
While making this documentary, Al Pacino had amassed some 80-plus hours of footage and it took six editors to cut it down to the film's theatrical length.
A lot of the scenes where the actors look frustrated and bewildered were real. Due to the fact that no one knew what kind of direction Pacino was aiming for.
Kevin Spacey was the only actor who was being paid Union scale during the project in which Spacey himself put back into the film to see its completion.