The Nude Vampire (1970)

Horror director Jean Rollin followed up Le Viol du Vampire with this equally strange excursion into vampiric eroticism. The plot concerns a suicide cult led by a mysterious figure known as The Master. Oliver Martin is the hero, who tries to rescue pretty Caroline Cartier from the cult, only to find out that yet another group of vampires wants to save her too. There's people with reindeer heads, the usual artsy sex and violence, and a science-fiction subplot about a doorway to another dimension (as in the later Phantasm). Maurice Lemaitre and Bernard Musson co-star in this pretentious but enjoyable shocker. IMDB