In the surface tracking there is the videocameradevice Script that allows setting the focus mode to "Continousauto"
This lets the device focus the camera background correctly
There is not such an option on the Dense mapping in the VIOCameraDevice.
There is a way to set it?
Actually on a device:
Android version: 10
The background camera work only if I set the device strategy inside VIOCameraDevice to "Easy AR Motion Tracker Firs" (otherwise I get a background that does not work), but I need to focus the camera background.
How to do it?