QRCode-Tracking via OpenXR Spatial Entities Extension on Meta Quest 3

fluffyspectre · September 26, 2025, 3:37am

Godot Version

4.5

Question

Hi everyone,

I’m currently searching for a solution to detect and track QR codes (6 DOF) on a Meta Quest 3.
I found the following pull request on GitHub and compiled a version of Godot 4.5 with the changes applied:

OpenXR: Add support for spatial entities extension #107391

github.com/godotengine/godot

OpenXR: Add support for spatial entities extension

master ← BastiaanOlij:openxr_spatial_entities_ext

opened 06:08AM - 11 Jun 25 UTC

BastiaanOlij

+7550 -17

[The OpenXR Spatial entities extension](https://www.khronos.org/blog/openxr-spat…ial-entities-extensions-released-for-developer-feedback) was introduced to standardise obtaining and interacting with information about the users real world environment. It defines [a core extension](https://registry.khronos.org/OpenXR/specs/1.1/html/xrspec.html#XR_EXT_spatial_entity) for how to query and interact with spatial entities, and defines additional extensions that detail out specific uses of these entities. Currently the core specification has support for: - [Spatial anchors](https://registry.khronos.org/OpenXR/specs/1.1/html/xrspec.html#XR_EXT_spatial_anchor), this supports marking locations in the real world that can be made persistent. Ideal for placing virtual objects into the real world and having them reconstructed in future sessions - [Plane tracking](https://registry.khronos.org/OpenXR/specs/1.1/html/xrspec.html#XR_EXT_spatial_plane_tracking), identifies various surfaces such as floors, walls, tables, etc. This allows us to know where surfaces are and provides the ability to place/attach virtual objects on/to these surfaces or apply physics to these surfaces. - [Marker tracking](https://registry.khronos.org/OpenXR/specs/1.1/html/xrspec.html#XR_EXT_spatial_marker_tracking), visually detects markers in the real world and brings their position into the virtual world. Currently supported are QR codes, Aruca markers or April tags. The spatial entities system is designed to be incredibly modular with future plans for additional (vendor) extensions to unlock further functionality. The core of the implementation in Godot therefor exposes a fair amount of underlying features that can be used in GDExtension plugins to implement such extensions or for users to fully customize the setup. However, in plain vanila mode all this logic comes built in and can be enabled in project settings. Using the built in logic all spatial entities are recorded as Anchor trackers with the XR Server and can be consumed through a simple manager script. While the implementation is deemed complete based on the published specification, runtime implementations are still being worked upon and some tweaking will be expected. Documentation can be found here: https://github.com/godotengine/godot-docs/pull/11015 Demo project can be found here: https://github.com/BastiaanOlij/spatial-entities-demo For testing sadly there are no public runtime implementations yet, however myself, David and Fredia have access to betas and have tested this. *Contributed by Khronos Group through the Godot Integration Project*

The Godot build works and I can run my test application on a Quest 3.
However, in the test app, OpenXRSpatialMarkerTrackingCapability.is_qrcode_supported() always returns false.

Does anyone know if I’m missing something, or if the Quest 3 (OS version v79.1034) currently doesn’t support QR code tracking?

Thanks!

Edit 10.12.2025:
QR-Code Tracking works now on Meta Quest 3 with the latest Horizon OS version (v83) using Godot 4.6 Dev 6.
Other marker types doesn’t seem to be supported right now.

mux213 · September 26, 2025, 5:02am

Spatial entities is a brand new API in OpenXR, it will take some time before headsets actually support it. Keep an eye out for news from Meta when they announce if and when they will support this.

To my knowledge there currently is no solution on Meta Quest for tracking QR codes other than implementing it fully yourself through the camera API.

fluffyspectre · September 26, 2025, 5:59am

Alright, then I’ll have to wait. Thanks for the quick reply!

system · October 26, 2025, 5:59am

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