I was working on one of my mods and I got to a point where I need to export some FaceGen data for custom NPCs. I accidentally also exported the FaceGen data for a Vanilla NPC, Olfina Grey-Mane. At the time, I didn't really understand how FaceGen data works, so I just went into Data\Meshes\Actors\Character\FaceGenData\FaceGeom\Skyrim.esm and deleted the .nif, and then did the same for the generated .dds. A few days later, I'm play testing the mod, and I run into Olfina Grey-Mane and she looks odd. Is there any way to fix this? Is the issue something that must be fixed in my mod? Or is it something that I must now fix in Skyrim.esm?

I was always under the assumption that export facegen data affected all NPCs regardless of who you selected.

Anyway, I imagine you have to unpack the textures BSA and copy/paste the facegen folder in the textures/actors/character/ directory.

Oh... I see what you are talking about. As it turns out, I forgot to delete the .dds, which accounts for why she looked strange. And, of course, now that I understand a bit more from what you said, this allows the FaceGen Data from the BSA to take over. Thanks for the tip, I was worried I'd have to start over.