A comma-seperated list of required features used by ARVRInterface.initialize when setting up the WebXR session.
If a user's browser or device doesn't support one of the given features, initialization will fail and sessionFailed will be emitted.
This doesn't have any effect on the interface when already initialized.
Possible values come from url=https://developer.mozilla.org/en-US/docs/Web/API/XRReferenceSpaceTypeWebXR's XRReferenceSpaceType/url. If you want to use a particular reference space type, it must be listed in either requiredFeatures or optionalFeatures.
A comma-seperated list of required features used by ARVRInterface.initialize when setting up the WebXR session. If a user's browser or device doesn't support one of the given features, initialization will fail and sessionFailed will be emitted. This doesn't have any effect on the interface when already initialized. Possible values come from url=https://developer.mozilla.org/en-US/docs/Web/API/XRReferenceSpaceTypeWebXR's XRReferenceSpaceType/url. If you want to use a particular reference space type, it must be listed in either requiredFeatures or optionalFeatures.