Aligning spatial nodes with real world objects

[berkselvi]

I have been working on project for some time now, where there are different VR scenes. Switching in between is done by background loading.

Some of the scenes consist of a virtual replica of the actual room where the setup is installed. I've been struggling to align the real room with the virtual one. Starting point is always correct, but the room is rotated depending on the HMD's orientation during initialization. center_on_hmd rotation is also based on this initial orientation of the HMD. I am not really sure if I am missing something or there is some room for improvement.