leveraging facial muscle variation

zygomaticus major dimple

Anatomical variation is a surprisingly ignored consideration for face tracking/facial mocap in tech and entertainment. Simplified anatomy diagrams are often accepted as universally applicable to all faces and few further questions are asked. The reality is: FACIAL MUSCLES ARE HIGHLY VARIABLE.

frontalis variation

frontalis shapes illustration

The frontalis muscle (forehead muscle that elevates your eyebrows) does not always follow the prototypes presented in anatomy diagrams. Frontalis shapes are widely variable, and this variability is a major contributor to age and expression-based wrinkle formations and brow shapes.

comparative anatomy (sneak preview)

chimpanzee landmark labels

Currently learning chimpanzee FACS, chimpanzee anatomy, and making custom chimpanzee landmark diagrams. (Chimpanzee landmarks determined by Animal FACS group. Original research work by Lisa A Parr, Bridget M Waller, and Jennifer Fugate. See: Emotional communication in primates: implications for neurobiology )

 ARKit to FACS Translation

Apple's Typo - "Outter"

If you or your team are using open-source face tracking kits to: animate faces overlay virtual content create expression-based events . . . figuring out what's what can be confusing; so I have created a ARKit translation guideline - starting with brow movements.

a wrinkle in time, part II: static forms

This post is Part II of a series on wrinkles types. Part I focused on wrinkle caused by repeated facial expressions – dynamic wrinkles. Part II will focus on another class of wrinkles: static wrinkles. While static wrinkles may not as exciting as dynamic expressions wrinkles, they are just as important to consider when applying to your character. As stressed in Part I, every line tells a story.