VRChat IK 2.0

So, having the chest bone of your Avatar not directly above your spine / having a bit of an angle to it, will result in to the chest looking really weird. It will be moved directly above the spine and will be rotated to 0 0 0. This is causing a bit of trouble for me and for everyone that uses a Rexouium Avatar, they all have a bit of a rotated chest / spine. I hope you can implement a fix for this. I also included a few screenshots from the old IK and the new IK.

Hi, Can we please have IK network jitter fixed? For example if someone shakes their head side to side, their whole body shakes. There was an 'addon' by Nirvash that auto immobilized the local player when no joystick movement was detected. It was a really good solution for the problem. Thank you.

Putting this here for Kung's reminder but shoulders in the latest build appear to look like they're overreaching in "arms on opposite shoulder" position. In my case, was only using standard 6pt setup. No elbow tracking. video: https://streamable.com/qncox0

When scaling an avatar via its root using AV3 (e.g a float/radial wheel controller that adjusts the root transform of the entire avatar), the shoulders do not scale correctly. This affects some situations e.g Dreadriths clone system when using elbow/shoulder tracking. Expected behavior is the entire IK scaling 1:1 as it always has in the past. It is only the shoulders that do this, and disabling shoulder tracking makes everything perfect. Video: https://youtu.be/Qx3PktsNM4A Thank you for your time :)

When leaning backwards or sideways in an avatar on IK2, the spine and chest bone joint does not bend at all forwards or sideways. This is only a problem with the head + hips locked as well(although my avatar has great proportions, so that shouldn't be an issue). This makes certain leaning positions look very wrong or broken. To fix, I tried messing around with the armature of my model, including having the hip root positioned perpendicular to the thigh bone's roots as well as trying with the hip above the thighs. I also tried angling the spine backwards, moving the viewpoint backwards/forwards, and even added a upper chest bone(haven't painted it yet, just wanted to see if that changed how the IK calculated bending, which it didn't). I found the least breakage to be with a straight spine and hips + things perpendicular, although small variations didn't change it terribly much. The best case scenario on IK-2 has the chest and spine bones be completely straight when leaning backwards, but the worst has them crunch backwards(instead of forwards like it should). I have tried multiple different avatars, and the issue seems to range from okay to atrocious depending on the rigging/weight painting, but mostly the flexibility of the user, as this issue only seems to affect people who can lean/arch far backwards. [pictures] (all my avatar) IK-2 Bad/Worst Back Leaning IK-2 Better Back Leaning IK-2 Bad Side Leaning Not IK-2 Optimal Back Leaning Not IK-2 Optimal Side Leaning My Armature with Unnecessary Bones Hidden (Cube is to show how straight the spine hierarchy is)

looks like it was updated to allow fbt to go through walls. however the half body elements of head and hands do not, leaving a cursed trail of your extended body

The pupil movement behavior is different between conventional IK and 2.0 IK. With IK 2.0, if the head is close to the ground (like in a prone position), the pupils will try to look upwards, and this cannot be disabled. If you revert to traditional IK, you will be able to face the front correctly. I know there are few users like me who are active close to the ground, but I hope this can be improved so that I can face the front.

while standing, moving wrist in an angle as if to read a watch can break the elbow rotation. If my knuckles are pointing downwards and i twish my wrist downwards, elbows will break.

I use a system where players are permanent attached to stations (own station is set to mobile, other ones to immobilized). The position and rotation of stations are synced (PlayerApi.GetPosition, PlayerApi.GetRotation). I use this system to be able to walk around planets. This worked fine before ik-2. In this scene, my feet points to a mirror and I turn my head to the tiger. When I turn my head from tigers perspective, my feet slaps to its body and my head points in another direction. I seems like the rotation will be applied twice (root + head). It is the same behavior, when I turn with my controller. When I move slighly forward or backward, I will suddenly rotate back in the right position. Is this a bug or a new behavior/breaking change? How can I sync stations with ik-2, so that there are no rotation offsets/jumps? My world is not public yet. But there is a world, which uses the same principle and where the behavior can be reproduced: https://vrchat.com/home/launch?worldId=wrld_bff9dcbd-d43a-4815-8dea-ef0d9455feba

When just using feet trackers, and no spine tracker (5-point tracking), the spine doesn't look in the same direction as the head anymore. Since moving (left joystick) fixes it, I suspect this is due to the IK Jitter Fix. Video: https://files.catbox.moe/68j61a.mp4