In a recent interview recollecting on this movie, Karl Urban said he refused to smile or take the helmet off at any point during the movie's filming or even in between takes. He spoke with an American accent and kept a scowl the whole time and stayed serious to keep in character. At one point, a cast member made a joke causing laughter on the set, and Urban gave him the 'Dredd' stare, prompting the person to immediately apologize.
Unlike the previous Judge Dredd movie, Karl Urban has confirmed that the helmet will never come off to keep true to the comic book character.
In the classroom in Peach Trees, as well as in the mall, the new American flag can be seen. It only has 6 stars representing the mega states.
The Lawmaster motorcycles were actual functional bikes ridden by actors and stunt performers during filming. The original bike was customized by having the chassis extended and custom fairings added, as well as being fitted with the largest tires that would allow the motorcycle to remain operable. The look of the Lawmaster from the comics could not be replicated exactly, as that would make the bike undriveable. The large front fairing contained non-functional prop guns and a working screen for the navigation and communication system. All the lights on the bike were operational.