★ — TECHNOLOGY
The uncanny valley — and how to avoid it.
The uncanny valley is the dip in audience comfort when a character is almost-but-not-quite human. Most CG characters that look creepy fail at four specific things — skin, eyes, micro-expression, and gait. Here's how to avoid each.
Skin: subsurface scattering
Real skin lets light penetrate and re-emerge. CG skin without subsurface scattering reads as plastic. Modern photoreal MetaHumans use dual-spec SSS shaders tuned for theatrical close-up.
Eyes: caustics + saccade
Real eyes refract light through the cornea (caustics) and dart constantly (saccade). Static stare-eyes are the #1 uncanny tell. Hero rigs add procedural saccade and caustic eye shaders.
Micro-expression
Humans make 20+ micro-expressions per minute. CG faces with only 51 ARKit blendshapes can read flat. Custom correctives + procedural blink + breath cycle save the performance.
Gait
Bad mocap retargeting reveals foot-skating, ground-popping and stiff joints. Foot-locking and ground-contact correction (every EquipVerse mocap retarget includes both) keep the character grounded.