Most npc's but usually some of the random npc's like Gamblers, ncr trooper, mercenaries, followers of the apocalypse may just have their entire face be a purple mesh. This mod comes with an esp and the esp contains the retextures of most npc's I believe this mod isn't too compatible along with 'Fallout character overhaul' This issue should be easy to fix but I need a little bit of help with that. This mod is personally one of my favorites but there is a big issue with it. 'Fallout new vegas Redesigned' is a mod that makes changes to certain npc's to make them look more like their voice actor, make gruesome scenes look gruesome and just edit npc's or scenes to make them look more realistic.