VRChat 2022.2.1 - The IK 2.0 Update!

This update includes a huge upgrade for our IK system that’s been in a compatible-with-Live beta for a long time. Thanks to the amazing feedback from our Full Body Tracking community, we’ve managed to fine-tune our IK system into a best-in-class tracking system. Everyone benefits from these changes, not just full-body tracking users!

… that being said, oh boy, is there a lot of cool stuff in here for FBT users. Then again, by our numbers, pretty much all of you are on the beta anyways! So, thank you for all the help testing and your excellent feedback!

Learn more about the IK 2.0 update in the documentation page we set up for it! We’ve also updated the Full-Body Tracking doc page to get it up to date with the new system. Alternately, check out this video!

In addition, we’ve made tons of other improvements along the way, including doubling the amount of avatar parameter space available, increasing the sync rate of avatar parameters for desktop users, a significant boost to PhysBones performance, big improvements to our input system that should help us net that vaunted "Steam Deck Verified" checkmark, and more!

Make sure you read the full patchnotes on our docs page – alternately, you can just check them out here!

Client

Features

• Added support for up to 11 points of tracking!

  • The newly supported tracking points are: chest, knees, and upper arms

  • Chest tracking will twist the chest based on your tracker’s rotation

  • However, when you use the "lock all" IK option, the chest will use both tracker rotation and position

  • For upper arms, a single tracker simultaneously controls the elbow and shoulder. To use shoulder tracking, you must wear your tracker above your elbow!

• Implemented Per-tracker IK combinations! It’s now possible to mix and match most combinations of tracker locations!

  • For example, if you have only two trackers and would like to track just your elbows without your lower body, that’s now possible

  • Asymmetric tracking is also supported: with just a single tracker you could track just your left foot if you choose

  • Asymmetric combinations such as just your right foot and just your left elbow are possible

  • If a tracker disconnects or is turned off, the per-tracker IK will readjust to mix and match tracking and IK for whichever trackers are still available

  • If that tracker is later powered on again, tracking will be restored with the previous calibration intact (even if this happens after switching avatars!)

• Users without elbow tracking (including non-full-body PC and Quest users) can enjoy automatic prevention of elbows clipping through the avatar’s torso.

• Full body users have new configuration options for FBT in the QM settings tab.

  • Lock-hip option: This option prioritizes hip tracking, allowing the head to drift slightly to avoid odd neck or spine crunching.

  • Lock-head option: This option prioritizes head tracking ensuring no view-point drift, but allowing the hip to drift slightly to avoid odd neck or spine crunching.

  • Lock-all option: This option strictly enforces both head and hip tracking. If the trackers get close together the spine will bend in any way necessary to have both align simultaneously. Depending on your avatar’s rig, this might cause odd posture. This option works best with a chest tracker

• Added a toggle to measure avatar scale by either arm-span or by height. The default is to measure by arms, switching this to measure