juan carlos maneglia was a regular visitor to asunción's mercado 4, and in 2004, he began planning to film the porters and vendors who worked there. the shooting of the film took place mainly at night. "7 boxes" had a cast of 30 people and a large crew. the production included an office near the shopping area, with the support of the leadership of the municipal market no. 4 for logistics and safety of the film crew. the national police accompanied the filmmakers for some sequences in which some sectors needed to be closed off for location shooting. the script provides about 75 locations for about 179 scenes. the filming of "7 boxes" lasted two months and two days of shooting, where more than 40 technicians and actors participated in the filming.