The obvious question: Does tracking 145 bones kill your frame rate?
During beta testing on a standard Ryzen 5 with an RTX 3060, BodyTalk v2 ran at 90 FPS while tracking two full skeletons. The developers achieved this by using "LOD Bone Culling" – meaning the system prioritizes the hips and spine (Spine LOD 0) and degrades the fidelity of the toes (Spine LOD 3) when the user is moving quickly.
Memory footprint increased from 85MB in V1 to 210MB in V2. The trade-off is worth it for the sheer volume of anatomical data available via the AnatomyBuffer.
Because the skeleton topology has changed, v2 is not a drop-in replacement for v1.
Check the Migration Guide before updating. bodytalk v2 - the extended skeleton edition
Runners can now get feedback on their "toe-off" efficiency. By tracking the phalanges and metatarsophalangeal joint, the software calculates wasted lateral energy. Golf and baseball coaches can visualize the "kinetic chain" from the tarsals up through the carpals, identifying exactly where power leaks out of the swing.
So, what does this look like in practice? Here are the core pillars of the v2 upgrade:
The original BodyTalk methodology was fantastic for acute issues. If you had a tight hamstring, we released it. But we noticed a pattern: the relief was often temporary.
Why? Because the skeleton was communicating a different story than the muscles. The obvious question: Does tracking 145 bones kill
If you have a misalignment in the tibia (shinbone), the body creates a counter-rotation in the pelvis to keep your eyes level. You can massage the glutes all day, but until you address the "extended" skeletal communication coming from the lower leg, the problem persists.
v2 is about listening to the root cause. It’s about understanding that the skeleton "talks" to the brain constantly, and if that signal is scrambled, movement dysfunction is inevitable.
Because the Extended Edition captures the proximal and distal interphalangeal joints of every finger, it is the first low-cost solution capable of distinguishing between the ASL signs for "MOTHER" (spread fingers) and "FATHER" (tapping thumb). This has massive implications for accessibility software.
v1 gave you a solid 17-joint skeleton. That’s great for walking, jumping, and basic gestures. But v2? We’ve gone full anatomy class. Check the Migration Guide before updating
We’ve expanded the skeleton from 17 to 33 joints. Let’s break down what that actually means for your projects.
1. Articulated Hands (No More "Claws") The old version treated hands as a single block. v2 tracks each finger with three joints per digit. Wave, point, pinch, or play air guitar—the precision is finally there.
2. The Spine & Shoulders Ever wanted to detect a subtle slouch or a deep twist? The extended skeleton adds clavicles and a 3-joint spine (chest, mid, lower). Now you can tell the difference between "leaning forward" and "hunching over."
3. Toes & Heel Yes, we added foot articulation. This is huge for sports analytics, dance, and VR locomotion. Now you can track weight shifts and actual toe-off during a run.
4. Extended Head Tracking In v1, the head was just a point. In v2, we track the upper neck and the lower head pivot. Finally, realistic nodding, tilting, and shaking.