Experiment with disguises
Costumes have been a fundamental and crucial ingredient in the Hitman formula since the show’s inception in the early 2000s, and their role in Hitman 3 is no different. Each costume has its own specific permissions and areas that you can access while wearing it. For example, crew members can explore one-level backstage and maintenance areas, while security guards generally have more freedom on the map with their security room and VIP lounge permissions. Be aware that not all disguises are created equal and that some are much more valuable than others, but part of the charm of the game is finding out which ones are more desirable.
The easiest way to get a disguise is to overpower the NPC wearing it, hide the body, and then put on their clothes. Depending on the mission at hand, Agent 47 can also acquire disguises by finding them in bathrooms, locker rooms, and other areas around the map. Each location in Hitman 3 is different from the last, as are the disguises inside.