ARKit to FACS: Blendshape Cheat Sheet
If you or your team are using open-source face tracking kits, figuring out what’s what can be challenging. Navigate the ambiguity with the FACS Translation Sheet!
action units (FACS AUs)
Lip Tightener vs. Lip Presser
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Eyebrow Shapes and Character Design
In FACS, there are three main brow actions: inner brow raiser
outer brow raiser, brow lowerer. These actions and their combinations deform our brows into particular patterns, allowing us to identify different expressions.
Animation Tips For Smiles
Nailing the right “smiling eye” look in your characters can be challenging – unless you know how the orbicularis oculi muscle works.
All About Upper Lid Raiser – AU5
In FACS, upper lid raiser, or AU5, is the action that raises and retracts the upper eyelid; this movement causes the eyes to appear wider and reveal more sclera (the white part of eye). The appearance changes we see in upper lid raiser are the result of an increase in contraction of levator palpebrae superioris, an extraocular muscle that works to keep the upper eyelid elevated.
“It’s All In the Eyes” and Other Lies: A Critique On Contemporary Emotion Research
Can we really measure smile authenticity? An exploration of the common assumptions we make about expressions of emotion.