keywords: Animation, Morph Target (Vertex Animation) Vs. Bone Driven (Skeletal Animation)

Relationship
  • FACS(Facial Action Coding System) based rig is a workflow with Blendshape Combination System tool-set.
  • Blendshape is a terminology in rigging tools(e.g. Maya, Blender).
  • Blendshape in UE4 called Morph Target.
Wikipedia

Morph target animation
https://en.wikipedia.org/wiki/Morph_target_animation

Skeletal animation
https://en.wikipedia.org/wiki/Skeletal_animation

Papers

Morph targets and bone rigging for 3D facial animation
http://www.diva-portal.org/smash/get/diva2:1130246/FULLTEXT01.pdf

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