Not many people realize this, but the Heavy and Medic's HWM head textures in SFM are outdated and using incorrect sets of teeth. Here you can see the default textures that SFM uses. They're old broken designs and don't match the rest of the mercs, in fact they don't even match each other. However if we import the HWM textures from TF2's files, they'll look as intended. No more hideously glowing teeth on Medic, and they match the other mercs' teeth. (Don't mind how grey they look, it's just the lighting and the fact I didn't open the mouths fully.)