There are 3 possible webAR tracking modes in XR+:
In the image tracking mode, the composition of the experience is displayed on top of a specific image target trained and recognized by the system.
To learn more about training an image target as an AR marker, see the AR image targets section.
With surface tracking you don’t need a specific image target, the project composition can be displayed on any flat surface using the webXR web API.
With the webXR API, you can place AR content in your environment anchored with a precise flat surface tracking and move around, that 6 degrees of freedom (6DOF).
Currently only possible on Android Chrome, Edge, and Samsung internet, on a large selection of phones.
Check list of supported phones
In cases where the webXR API is not available on the phone browser, then a 3 degrees of freedom (3DOF) fallback is used, with a simpler tracking method, but compatible with absolutely all cases.
With the fixed tracking mode, the AR composition for your project is always visible, centered in the middle of the phone screen.