El coleccionista de cadáveres aka Cauldron of Blood (1970)

Boris Karloff plays artist Franz Badulescu

Rosendra Monteros plays artist Valerie

The film is set on an island that is an artists colony, it’s star Boris Karloff plays a blind sculptor, Charles Badulescu, who uses the bones of real people in the creation of his art. As he is blind he is seemingly unaware of the fact the armatures for his sculptures are in fact skeletons of people killed on the island.

We first meet the artist in his mansion, a reporter wants to interview him about his work

Franz Badulescu working on his latest commission in his studio.
His wife Tania, who provides the armatures for his work, comes to check on the progress 

Franz Badulescu’s work in progress

Franz Badulescu in his studio, tired from having just finished his sculpture

Franz Badulescu’s wife Tania comes to inspect the final piece

Franz Badulescu’s final sculpture

Rosendra Monteros as artist Valerie

The artist Valerie shows the reporter how artists use an armature to make a sculpture

Franz Badulescu‘s wife Tania’s nightmare

Cauldron of Blood on IMDB