Tekken 8 Facial Bones Examination - CDDTreborn/Tekken-8-Resources GitHub Wiki
Mouth: X_LipCorner (L,R). Simple Lip corner setup.
X_UpLip (C,L1-3,R1-3). These bones are controller bones and the bones they control provide weights for the lower part of the upper lip.
The lower lip is built the same.
Eyes are simple X_Eye (R,L)
X_UpEyeLid1-5. Direct Deformers for the upper eyelids, lashes, AO, and tear ducts
X_LowEyeLid2-4 have a child X_SubLowEyeLid2-4. The parent controls the inner lid closest to the eyeball and the sub/child controls the outer part of the eyelid.