Bodytalk V2 - The Extended Skeleton Edition May 2026

Unlike traditional models that use linear bone scaling, BodyTalk v2 employs Spherical Interpolation of Quaternions across a hierarchical joint chain. The "Extended" part refers to the addition of "sub-joints" (meta-carpals, interphalangeal joints) that are mathematically inferred from the movement of the larger bones.

Key API Features:

The system supports input from standard RGB cameras (via a custom-trained PyTorch model), IMU arrays (like the XSens or SlimeVR), and even EMG gloves for hand sub-bone tracking. bodytalk v2 - the extended skeleton edition

BodyTalk v2 — Extended Skeleton Edition is not an official product from a major company. It's most likely a community-driven mod or configuration that allows full-body tracking systems to drive non-humanoid avatar bones (tails, wings, ears, digitigrade legs).

It solves the problem: "I have an anthropomorphic/dragon/furry avatar with extra joints — how do I make them move naturally in VR?" Unlike traditional models that use linear bone scaling,

Without it, those extra bones either stay frozen or require complex custom scripts. With it, they follow body movement via IK, physics, or secondary motion.

If you meant a specific GitHub repo, Discord mod, or Patreon release called exactly "BodyTalk v2 Extended Skeleton Edition," I’d need the link or more context (e.g., which software ecosystem: VRChat, Resonite, Neos VR?). Otherwise, the above is the definitive technical & community explanation. The system supports input from standard RGB cameras

Indie developers using the old system often complained that characters looked "floaty." This is because the feet weren't articulating. With Extended Skeleton, walking on stairs or uneven terrain looks natural because the toes actually bend and the ankle rolls. For fighting games, it allows for "true ankle lock" submission detection.

Traditional skeletal tracking systems rely on a "core skeleton"—typically 15 to 33 joints. You get the head, neck, shoulders, elbows, wrists, hips, knees, and ankles. For basic waving or walking, this works. But for nuanced interaction, it fails miserably.

BodyTalk v2 - The Extended Skeleton Edition expands this model to include 53 to 78 distinct joints, depending on the configuration level. The "Extended Skeleton" refers to three specific upgrades: