Gtavytp603

Hello Everyone, Im making a Legate Lanius armor mod for Skyrim LE but I have some problems. I already did make a working armor but the problem is the helmet. I can see it in creation kit and everything seems ok, but in game after loading a save its invisible. Could someone suggest what could I do or could someone tell me how to make a custom helmet with a ported model? I can't find any tutorial that shows how to make working helmets. Thank you