This chapter examines Brecht’s approach to film not as a mimetic means of reproducing reality but as an indexical means of producing reality. It considers key passages of “The Threepenny Trial” and several interwar fragments in order to elucidate Brecht’s distinction between actual and functional reality and to elaborate the concept of the cognitively capable masses, whose collective perception made recognition of actual reality possible. It then offers brief analyses of the key films Brecht worked on, Kuhle Wampe and Hangmen Also Die!, which provide examples of the strategies Brecht employed to bend film to his aims of modeling mass-based cognition and reality production. These attempts opposed industrial norms, cultural convention, and the regulatory force of the state. They succeeded infrequently if at all, as Brecht himself acutely realized. Assessing the success and failure of these experiments allows greater insight into the potential of the medium of film in the second quarter of the twentieth century and creates potentially useful points of comparison to the complex relationship between representational media and the networked production of reality in our own times.