ok, I dont remember much, I was very young. I saw it in between 93 and 98. Seems like a late 80, early 90s. I remember a young man who is being either possessed by or is becoming an alien/monster/ interdemensional being. He has a girl on an alter. Its on top of a plateau of red clay earth with a very red stormy sky. I get the impression he is fighting against whatever is controling him and trying to make him kill the girl. That’s all I remember.