Full-Body Tracking

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Full-Body Tracking (FBT) in VRChat allows users to track other parts of their body besides head and hands, such as hips and legs. This allows users to more accurately reflect their real life movements to their avatar. Full-Body Tracking allows for more expressive and immersive movement.

How Full-Body Tracking Works

Full-body tracking (FBT) uses additional tracking devices attached to the body to relay real-time movement data to the VR system. Typically, trackers are placed on areas like the feet, hips, and sometimes other parts of the body, depending on the setup and how many trackers are being used.

Most trackers require the use of SteamVR Base Stations to be able to track the trackers within a persons playspace. There are other solutions that use cameras, or IMU's to track the position and rotation of the trackers.

In VRChat, avatars that support FBT will mirror the user's real-life movements, allowing for a more immersive experience. For the best results, avatars should be configured with bones for the hips, knees, and feet to accurately follow the user's movements.

Compatible Hardware

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This section contains a list of trackers commonly used by the community. These are not official recommendations or endorsements from VRChat.

• HTC Vive Trackers:
  • These are some of the most common trackers and are compatible with VR setups that utilize base stations. They are typically placed on each foot and the hips or waist. SteamVR Base Stations are required.
  • Pros:
    • Provides very accurate tracking.
  • Cons:
    • Requires at least one base station (additional base stations improve tracking and prevent tracking loss)
    • Trackers will occlude if out of sight of base stations. For example, if the trackers are covered by a blanket, tracking will be lost.
• Tundra Trackers:
  • Similar to Vive Trackers but smaller and lighter. They also have longer battery life. SteamVR Base Stations are required.
  • Pros:
    • More light-weight than other trackers.
    • Provides very accurate tracking.
  • Cons:
    • Similarly to Vive Trackers, they will lose tracking when occluded.
    • Also requires at least 2 base stations.
• SlimeVR Trackers:
  • SlimeVR trackers are a more budget-friendly solution and do not require base stations as they utilize IMUs for tracking, which calculate position and rotation in relation to the headset and hand controllers. They can be purchased directly through SlimeVR's Crowdsupply, or can be "DIY'd" with their documentation. SlimeVR is entirely open-source, hardware and software.
  • Pros:
    • Provides a typical FBT experience at a lower price, ideal for headsets that use inside-out tracking such as the Quest
    • Does not occlude, meaning trackers will not lose tracking when when under something such as a blanket. This is due to not relying on base stations.
    • It's open-source nature allows for users to DIY their own trackers. This also allows for third-party sellers to create their own trackers and sell them.
  • Cons:
    • Trackers will occasionally "drift" over time during a session causing inaccurate tracking, requiring the user to reset them occasionally.
    • Tracking is more imprecise than other trackers, especially depending on the quality of the hardware.
    • DIY can be difficult or expensive if one doesn't already have the tools and understanding to create it themselves.
    • Some third-party sellers will sell trackers with cheaper IMUs or otherwise faulty hardware that could cause issues. Ensure the seller is reputable before purchasing.
• Other Devices: Some custom setups also incorporate PS Move Controllers, Kinect sensors, QR codes, such as AprilTags, and other SteamVR compatible controllers, although these methods are less common.