VRChat IK 2.0

VRCSDK 3.7.5 Unity 2022.3.22f1 >Settings : In AnimatorController used in PlayableLayers, any of the “Foot IK” in the state settings are enabled. >Environment where the problem occurs : Remote avatar (avatar as seen from others) >Assumption : AnimatorController enables FootIK to realize the gimmick. Therefore, all proxy animations with broken IK are not used, and the created Tpose and IKPose are set. This allows the full body tracking to function properly. The avatar has a mechanism in place to switch tracking and animation locally, and we have confirmed that any remote changes will have no effect. The avatar is set up with normal full-body tracking enabled, as well as foot and hip tracking, or full-body tracking disabled. >overview There is a small issue that occurs in both desktop and VR mode. That is what happens in the remote avatar perspective. When the avatar does some animation and disables foot tracking, it will momentarily tpose to a moment of no motion at room scale, but then revert back to normal. This issue itself will come up later in the issue. In VR mode, full body tracking (5-point and 6-point tracking) is not synchronized, even though all tracking states are enabled. When not synchronized, the animation appears to be a Tpose animation. When not in sync, it is not moving at room scale. Also, in the reference video I uploaded, when the avatar is on the skateboard, the tracking of the feet is turned off, but the same phenomenon is happening. When the avatar is moving, there appears to be no problem. Again, this is happening remotely. Locally, where the IK animation is set up, the problem does not occur. * However, when the HMD is turned up and down during full body tracking, the entire avatar shifts up and down, but I am not that concerned about this issue. >Animation of remote viewpoint Link : https://youtu.be/0GC4_BNo284?si=A-5Y8n8rTHCzl1wC Translated with DeepL.com (free version)

See attached video. When I lock in in 11 point tracking using Lock All mode. and the hip tracker is on the side of my hip, the spine leans to one side. This is 100% repeatable across multiple different types of avatars whether they are my own or from other creators and in different body types. The issue is not present when the hip tracker is centered at the front of my body.

There are situations where one might want to track their hands, waist, feet, etc. but not have an HMD connected. This is especially true when trying to debug OSC trackers. Currently, all settings related to body tracking and FBT calibration are hidden when running VRC without an HMD connected. IK solver may not work correctly without a headset input, but that input can be provided or spoofed via OSC based on the documentation here: https://docs.vrchat.com/edit/osc-trackers

Half body (3 pt tracking) used to receive less attention while it accounts for so much of the player base, notably the quest user-base. Depending on how high you are from the ground of your play-space, VRChat will chose between three animations to solve the IK for your lower body while in VR, standing, crouching, and prone. Half-body used to take around 2-3 seconds to load in the leg locomotion (when moving using your play-space and not the thumb-stick) to initialize, so players would often "hover walk" around for a bit when you load the avatar in your line-of sight, which is a related issue that is fixed in the new IK beta thanks to Kung and the VRC team ^^ Leg motion (stepping) does not transition effectively between these modes (crouch prone and standing) and the legs often fail to touch or contact the ground in half-body when crouching. Having a system that would integrate leg movement for play-space based movements while crouched and prone in half-body would change that.

Stop locking avatars in place when players walk through walls or high furniture by walking around in their playspace. It's unnecesary, doesn't help with immersion, is annoying, causes confusion, and/or gives cursed results. If you want to add some optional thing for world creators so players can't look through walls and cheat in games n such: be my guest, but this current behavior doesn't work this way.

This is a bit of a specific case, but I have some avatars that I actually don't want the spine to bend on. My problem comes when I limit the spine rotation in Unity in the avatar config, my hip is always rotating with my tracker, However on certain avatars I don't want that to be the case due to their body shape. When I limit the spine rotation, the head desyncs from my real head in Lock Head, Lock hip and lock both mode and the entire spine bends downwards because the hip tracker rotation is always forced to rotate the hip no matter what. I feel like if there's a rotation limit on the avatar rig settings, it should possibly keep your head in place and make the spine not rotate on the up/down axis, and decoupling your hip tracker rotation in this case so your spine stays straight, I know it's not really physically accurate but it can be a stylistic choice for avatars with strange body shapes. Attached below are the rig muscle settings in Unity combined with how it looks like in-game. I'm doing the exact same pose here IRL in both screenshots. I wonder if this could be a setting or something?

The hand should be able to freeze just the like the body tracker. Right now, my hand get shot in one direction.

me and my friends were all in the beta together in the same world for like 3 hours so far. and over time some peoples ik will start to update slower sometimes to a point of only updating 1-2 times a second. rejoining world fixes it atleast.

I am not going to stand up to calibrate when I was comfortably lying down. If I crash and am that comfortable, I just give up on VRChat for the time being, even though there's friends I would have rather stayed with. Following a crash and quickly restarting VRChat, trackers are not going to be aligned any differently.

The head on desktop is limited to -35-45~ degrees of up/down motion from a third person view. The BetaIK does not take this limit into account, and will push the entire body forward/back once you've looked past that outside limit. Clip explains it better: https://cdn.discordapp.com/attachments/946881839400882196/969455978024173648/VRChat_2JLQUSBUdr.mp4 I used the world Full Body Calibrate for the clip, as it has a third person camera available for desktop: https://vrchat.com/home/world/wrld_a5e9ec13-36b1-4e63-ae0c-dab9023401f9