Title says it all. Instead of the textures from my image being applied to my mob, plain white ones do (see attached). I am using Optifine's CEM feature to alter Hoglins.
On an unrelated note, I noticed that the rotations I've applied to the head model don't apply in game; The head faces downwards (in an angle similar to default) when I want it to face more forward. I'm told that this is because the angle of the head is "hard-coded". Is this true? Is there anything I can do about this?