All I remember from this movie is that it was low budget, there was music but not speaking and these naked people appeared to be either in a cave, in hell or somewhere under ground. There were running around and walking around. I only saw a short scene from it but it appeared that whoever wrote it was on some serious drugs or something. It’s been bugging me for years trying to remember this. Any help would be great.
Forbidden Zone (1980)?
I’m guessing this because it gets asked about alot. Here is a trailer.
https://youtu.be/uUY1LRS23YM