There was an emphasize on practical blood in the earlier episodes with the later ones relying more on CG. “We usually do a LiDAR or photogrammetry scan because we add several impacts or muzzle flashes or squibs that explode in the walls. It’s much easier for us to understand the space and the distance from the camera to the actors.”
A mountain had to be rebuilt in Columbia and cleanup was done on a harbor in Africa. “Stefano Sollima comes from an important series called Gomorrah and I knew what kind of photorealistic visual effects were needed,” remarks Leoni. “For the car chase in the first episode we shot the two main actors on greenscreen in a studio and did a plate for the background of the car that is following. We composited everything and matched together. When all of the military guys are in the square with the Mexican flag, they are digital doubles. In Italy, we did a crowd replication to fill the frame. For Africa, we cleaned up the desert and put in a refugee camp. In the Mexican market, we cleaned up the background for billboards and signs that the production didn’t have the licence to use and also made changes for aesthetic reasons.”
Previs was created for the explosion at the television station. “We did previs to understand the timing of the explosion, which was to be added in post-production, as well to figure out what could be practically captured at the location and how much greenscreen was needed. I prefer not to use greenscreen or bluescreen because they change the light. I favor rotoscoping and keeping as much of the set as possible. For the scenes at the airport we had to cover all of the billboards with greenscreen.”