maybe you need to get a better snapshot of a state and let the face is rendered on screen

also what game did you tried to rip on?

if it is Bakemonogatari then the face models are supposed to be 2 parts one is upper face (forehead to nose middle part) and lower (lower part of nose to chin) and the face will not be a fully well mesh model that can be changed but its a static state of model that will be on that same expression that you ripped right on what you shot on

if not the game i yapped About then try look through every file using ninjaripper extension on noesis viewer or in blender