I've been experiencing a problem for quite some time now that I finally decided to tackle more seriously. Basically, my character's eyebrows clip through her head to varying degrees when I use certain facial animations, which looks very annoying. Here's an example of what I mean:
I do have a suspicion what might be causing this. I use the YgNord race from ECE, but I modified the .tri morphs in blender to look like vanilla nord morphs. So maybe I forgot to edit some files that might