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uid: arsubsystems-face-subsystem
---
# XR face subsystem

The face subsystem detects and tracks human faces in the environment.

The face subsystem is a type of [tracking subsystem](index.md#tracking-subsystems). Its trackable is [`XRFace`](xref:UnityEngine.XR.ARSubsystems.XRFace).

## Face mesh

In addition to a pose, the face subsystem can supply a mesh representing each tracked face. Vertices, indices, normals, and texture coordinates are all optional. To determine runtime capabilities, check the [`XRFaceSubsystemDescriptor`](xref:UnityEngine.XR.ARSubsystems.XRFaceSubsystemDescriptor).