Yes, that was Marli Renfro. She was a glamour model, who was paid $500 for the job. I believe her face (and her nipples) actually appeared in a few frames of the scene. Marli completely disappeared for decades, and the rumor was that she'd been murdered--sort of "the curse of Psycho". There was even a book written about it. The rumor was completely untrue, and she turned up alive and well, just a few years ago.

some scenes having partial or full nudity were filmed on the rooftop and the premises of their hotel to avoid public gathering but people residing on the second floor of the nearby hotel could see the filming very clearly , this time i was very lucky .they were shooting a scene where kate took bath after pouring water on a old lady(her mother in the movie), she took bath just in bra and panties and while she was wrapping around a white bathrobe , i got a quick glimpse of her crotch!! i was shocked ,she had a bush , fully grown bush! and even more absurd thing was her dense armpit hair which she unknowingly used to flash every now and then at the set. i could not understand all this unusual thing until i watched the movie ,even in the movie she has exposed her pubic hair many times . sadly that bathing scene has been cut from the theatrical version and replaced by a nude desert scene . she had later admitted in an interview that she had to grow her pubic hair (specifically underarm hair) as the director thought that it would look more natural. in the photo taken she is shopping in the same bathrobe . the photographer has not shared some more interesting photos , he had either missed that interesting scene or just wants to keep them private.. any way here it comes..

i think its better to see a screenshot from the movie to get a proper approximation of her pubic hair

some more..there in the backside is the hotel RAK (white building )where all the crew members stayed.

some more behind the scenes shots

just take a look how she looks while dressed decently and while not dressed at all . the second pic is a hd screen capture from the same movie

she is one of the rare actresses who goes fully nude in a natural way! good figure ,nice hairy pubes makes her one of the cutest lady ever !

one more (its a screenshot), zoom it to see the under arm pubes and her nice pussy. its a classic shot!

behind the scenes photo courtesy (.katewislet fan,com) and screen capture courtesy from elles se mettemt (its a french site)

Publicity stills/lobby cards of Karen Allen and Toni Kalem (in their underwear), from the film; The Wanderers.