If you buy or craft google cardboard, it will either come with QR code or you can generate one that creates viewer profile and saves it to google carboard app. This profile contains information required to correctly setup headset like screen to lens distance, inner lense distance, K1/K2 coeficients etc.
There is MobileVRInterface class that can hold those informations [https://docs.godotengine.org/en/stable/classes/class_mobilevrinterface.html] however it lacks any methods. Is there way to load viewer profile from app or it is done automatically or I need to parse it from file or something ? Sorry I'm new to mobile VR, any help highly appraciated