>>328066917
vrchat doesn't support it but other games do and things like vr based motion capture animation software use it
all it does is give the IK system more data points to use in determining the body position
3 point is head and hands which is the default of a vr headsets
which means the IK system estimates everything except the head and hand positions
6 point is head, hands, waist, feet
which means ik system estimates elbow, knee, chest and shoulder positions
12 point adds knees, elbows, chest and shoulders so it has pretty much everything it needs and there's essentially no IK at that point, your full body is tracked in real time, there's no estimating