Patrícia Scalvi in Orgia das Taras (1980)

The thriller from Brazil titled Orgy of Perverts stars Patrícia Scalvi naked dancing to the title music, and in a couple of carefully selected sex scenes.

Patrícia @ IMDb
Patrícia @ Wikipedia (Portuguese)

Patrícia Scalvi in O Convite ao Prazer (1980)

A classic of the pornochanchada genre Invitation to Ecstasy features Patrícia Scalvi naked in a sex scene with an older man who is powerless to prevent her getting on top.

Patrícia @ IMDb

Patrícia Scalvi in Bacanal (1980)

The tropically set Bacanal, a pornochanchada directed by noted cinematographer Antonio Meliande, features Patrícia Scalvi stripping naked at gunpoint in a long group hostage scene.

Patricia @ IMDb

Aldine Muller and Patrícia Scalvi in Ninfas Diabólicas (1978)

In the supernaturally-tinged Brazilian sex comedy (or pornochanchada) Telepathic Trollops (OK I just made that translation up) Patrica Scalvi swims naked in a paradisiacal river setting, and Aldine Muller bathes naked from a tropical beach.

Patricia @ IMDb
Aldine @ IMDb