So I downloaded the Creation Kit with the intent of playing around with clothing and armor, eventually probably adding something new but starting off with something small - like maybe fiddle with some hoods to allow Khajiit ears to show through the way they do on the maskless Shrouded hood, but I'm scratching my head trying to find the difference between the maskless Shrouded hood that leaves the ears visible and every other hood in the game. I can't find any kinds of tutorials on armor/clothing creation that explain the difference, either.
Can someone who knows what they're talking about try to give me a sense of how biped body parts in Skyrim actually work?