Francinette Costa in A Árvore dos Sexos (1977)

The nicely made if rather tame pornochanchada The Tree of the Sexes features Francinette Costa swimming in the nude down by the waterfall with her sister.

Francinette @ IMDb

Aldine Muller in Uma Cama Para Sete Noivas (1979)

In the routine pornochanchada titled One Bed for Seven Brides newlywed Aldine Muller is stripped naked in her honeymoon suite.

Aldine @ IMDb
Aldine @ Wikipedia (Portuguese)

Indra Brike in Sudbinushka (1989)

The biopic of a Latvian folklorist Destiny contains some attractive if routine scenes of Indra Brike naked in her bathtub and on her wedding night.

Indra @ IMDb
Indra @ Wikipedia (Latvian)

Evgenia Dodina in Uroki Muzyki (1990)

In the Soviet domestic drama Music Lessons the surprise highlight is Evgenia Dodina stripping naked to change her clothes in front of her family in the middle of their overcrowded flat.

Evgenia @ IMDb
Evgenia @ Wikipedia