I'm trying to create an NPC, Jac, that has a specific appearance, and has a health regen rate of 0 (because of reasons). It looks like the cleanest way to make an NPC have no health regeneration, is to make them a custom race with a health regen rate of 0. I created the NPC as an imperial, exported a .npc appearance file from an imperial savegame, and imported it into the mod manager - so far, so good, the .npc file works. Then I created a duplicate of ImperialRace and renamed it ("JacUndeadRace"), no other changes yet. I switch my NPC to be of JacUndeadRace, and now he looks like preset #1. I import the .npc file again, and his race switches back to Imperial. I realized that .npc files are plain text, so I tried manually editing the FormID of the Race field. After I did this, importing the .npc file will change Jac to be JacUndeadRace, and change his appearance to preset #1 - not the appearance I saved in the .npc file. I also tried removing the "race" field from the .npc file entirely, and that didn't work either. I've also tried to make JacUndeadRace playable so I can re-create the NPC appearance with the correct race, but even though "playable" is checked, it doesn't appear as an option in the race menu when I load my mod (using ModOrganizer). Does anyone know what I might be doing wrong here?