APOLLO 11 DRESS REHEARSAL
The Apollo 11 astronauts rehearsed every action of their time on the moon in a NASA blacked out studio.
The real thing
These dress rehearsals were extensively photographed (and videoed?), so that if the live transmission links from the moon failed they could be shown instead as the astronauts carried out each task.
So in a sense NASA did ‘fake’ the moon landing, as believed by conspiracy theorists, but if they really had, this is what the fake photographs would look like.
Using a duplicate Lunar Excursion Module and equipment, resting on an imitation lunar surface, fully suited up, and illuminated by an artificial sun. The only thing that couldn’t be simulated of course was the reduced gravity.