Visible crew/equipment: In the dinner scene in "Her" Excellency garden, right after Lamia breaks the egg in her hands, there's a cameraman's reflection on the metal jug held by Max.
Visible crew/equipment: When Max, Albert and Lamia exit the underground and walk inside the tent with painted false landscape, there are regular rows of studio lights visible reflected in their helmets. They would immediately recognize that it's not a real world if the lights were there.