Hand Tracking

Overview

Basis supports articulated hand tracking through OpenXR, so your avatar's fingers follow your real hands on runtimes that expose hand tracking — such as Quest's camera-based tracking or a PC OpenXR runtime that provides it. No per-avatar setup is needed: hand tracking drives the same finger pose system that controllers do.

What gets tracked

For each hand, Basis reads the wrist pose and the curl and spread of all five fingers:

• Curl — how far each finger is bent, from open to a full fist.
• Spread — how far the fingers are splayed apart.

These feed your avatar's hand pose every frame, blended smoothly so finger motion looks natural rather than snapping between poses.

Controllers and fallback

Hand tracking and controllers share one pose pipeline, so you can switch between them without any change in setup. When a hand isn't being optically tracked — you're holding controllers, or a hand leaves the tracking volume — Basis falls back to driving the fingers from the controller's trigger and grip instead, so your avatar's hands still close around grips and respond to input.