Widziadlo (1984)

"Widziadlo" (1984), a Polish horror film directed by Marek Nowicki, includes several nude scenes which are quite explicit for its time and setting.

Hanna Mikuc appears nude in various scenes, including one where she is seen riding a horse, which has been noted by reviewers for its artistic nudity.
Dorota Kwiatkowska, who plays the spirit of Angelica, is also featured in nude scenes, particularly emphasizing her character's haunting presence throughout the film.
Marzena Trybala, Monika Braun, and Anna Chodakowska are among other actors who appear in scenes involving nudity, with Trybala's character, Ola, being central to the plot's exploration of infidelity and obsession.