Random smoothing of Sims’ faces

I use Mods, so I know they can sometimes interfere with the game. After I downloaded some new skin overlays the other day, my sims who didn’t wear them, started appearing with their faces smoothed as though they had. I went through my Mods folder, and deleted EVERYTHING I had downloaded that day (not just the skin overlays in case something else was interfering), and yet my sims still appear that way! Nothing appears on them in CAS i.e. no overlays are used, they just look that way. I don’t know what to do, because it’s obscured a lot of their faces in a way I don’t like ☹️ Should I delete and then re-enter all my mods? Have I missed an update or something?? 
Here is an example of what my sim used to look like, and what he looks like now.