Strange Lighting Glitch with the Team Fortress 2 HWM models

So recently, posing has become a pain in the ass for me because of this:

The model on the left is a standard model that isn’t really used for screenshots and such due to the lack of control over the facial expressions. The model on the right is the HWM model, and as you can see, it looks strangely bright and glossy when the face is left alone, but once posed, it immediately stands out like a sore thumb. The bright white spots can also go black in darker environments.

I am not sure how to fix this issue. I messed with mat_specular at one point, but that didn’t work. I would rather use the HWM models than the standard models. Any help would be appreciated.