NO modern technology, NO guns, NO tanks, NO helicopters, NO aircraft, NO explosives, NO lasers, NO anachronistic elements, NO unrealistic fantasy creatures, NO magic, NO futuristic elements, NO science fiction elements, NO superheroes, NO giant monsters, NO futuristic vehicles, NO aliens, NO extraterrestrial beings, NO anachronistic clothing, NO modern buildings, NO skyscrapers, NO contemporary signs or symbols, NO cyborgs, NO futuristic armor, NO anachronistic characters, NO modern references, NO contemporary language, NO unnatural lighting effects.