In 6 point tracking, some avatars (which worked perfectly before 11 point tracking update) have their chest pushed forward.

This is causing a warp around their chest and neck and making the avatars look very weird.

I am facing this issue since the IK-beta Build 11901. (I simply didn't have a chance to try the non-live Build 11748)

After carrying out some experiments I now guess this is due to the Chest Bone pointing upwards, regardless of the original (desired) rotation.

The images show how the Bones should be located (Unity capture) and the actual position in VRChat.

The Chest Bone (and perhaps the Neck Bone) is losing the desired angle and aligned vertically.

The very avatar I suffer this issue is made with VRoid Studio, converted through blender.

(I saw my friends' non-VRoid avatars facing the same issue too)

It didn't work properly in the legacy IK, but it worked perfectly with the IK 2.0, which really delighted me.

However it faces another issue here in the latest update.

Thank you.