Err, when I create an NPC, they look perfectly fine in the editor, but when I view them in the game, the skin colour for their head doesn't match their bodies. Their bodies' skin colour is exactly what I chose in the CK, but from the neck up to their head it's a dark grey, like they're back from the dead or something.

http://steamcommunity.com/id/pandazooka/screenshot/506889850772723183

How do I fix this?