I know this particular topic has been discussed to death but I think I have a new twist to add to it. After playing for a bit I noticed that the skin of the male npcs (myself included) was black/semi-transparent. Ordinarily this has something to do with cache and probably a restart solves it right?
No such luck.
I removed some of the more graphically demanding texture replacers - no luck. I tried loading a save from waaaay back in case it had been baked in - no luck.
It was then I noticed something weird - not only did all the lady NPCs retain their proper skin but also every single one of the forsworn. Including the men. They all had normal skin textures.