The film was not completed, but somebody edited all the existing footage into a 37-minute video. Marilyn’s nude scene begins at about 22:14,
Some stills from the footage
And a famous photo taken on the set
From the comments:
Here are all the outtakes of that skinny dip scene. I often wondered if they intended to show that much or if they just took nude stills and sell them to Playboy. Judging by the amount of times she mooned the camera, it was obvious they intended for that shot to be on the final film. She did approve some of the stills before she died and even wrote a note that says ‘Send this to Playboy. They might like it.’

Here are all the outtakes of that skinny dip scene. (1, 2) I often wondered if they intended to show that much or if they just took nude stills and sell them to Playboy. Judging by the amount of times she mooned the camera, it was obvious they intended for that shot to be on the final film. She did approve some of the stills before she died and even wrote a note that says “Send this to Playboy. They might like it.”
that’s just depressing, man.
Dead for 60+ years & guys still wanna see her bare ass – if that ain’t some kinda legend…