Use Fast Motion Mode

• Improved tracking of fast movements common in fitness and rhythm apps.

• FMM optimizations may increase jitter, impacting high accuracy interactions like direct touch or typing.
• Tracking quality regresses in low lighting conditions because fast motion relies on short exposure time. Remind users to play in a well-lit environment.

• FMM is supported on Quest 2, Quest Pro, Quest 3, and all future devices.
• On Quest 1, enabling FMM increases hand tracking frequency, but does not provide further optimizations.

• Unity version 2022.3.15f1+ (Unity 6+ is recommended)
• Meta XR Core SDK v59+

• You cannot enable FMM with Multimodal.
• When used in combination with passthrough, virtual hands may appear more responsive than passthrough hands. Take this into consideration when designing an experience that combines FMM with passthrough.
• IOBT/WMM will not run when passthrough and full-body (FBS) are running alongside FMM. To use FMM together with IOBT/ WMM in passthrough, turn off FBS.
• On Quest Pro, FMM cannot be enabled together with face tracking, eye tracking, lip sync, or foveated rendering.

1. Open your Unity scene.
2. From the Project tab, search for OVRCameraRig and drag it in the scene. Skip this step if OVRCameraRig already exists in the scene.
3. Under Hierarchy, select OVRCameraRig.
4. Under Inspector, under Quest Features, in the Hand Tracking Frequency list, select High. There is no difference between High and Max values as both track hands at high frequency.

• How can I confirm FMM is running on my headset?
  1. To verify your device has FMM enabled, run adb logcat -e FMM on a terminal when hand tracking is running on device.
     The output should be NIMBLE: HTEngine: FMM: enabled: true; active:....
• FMM isn’t running on my headset. What should I do?
  1. If enabled is false, restart your headset a couple of times for the client to fetch data from the server.
  2. To verify your FMM is actively running in your app:
     1. Ensure that your app is running on the foreground.
     2. Run adb logcat -e FMM.
        The expected output is NIMBLE: HTEngine: FMM: enabled: true; active: true.
     3. Run adb logcat -e "Camera FPS" to verify the camera frequency is around 60 Hz. “Around 60 Hz” means plus or minus about 3Hz. However, the acceptable frequency also varies based on the voltage and frequency in your country. While North America and some of South America are at 120V 60Hz, most other countries are at 240V 50Hz, so they will see 50Hz in FMM.
        The expected output is NIMBLE:HTEngine: Hand Tracking Processed FPS = 58.5 Hz / Camera FPS = 60.1.
• Can I evaluate the feature on my headset without changing my code?