Watching "Go beyond the window with SwiftUI" and the presenter is talking about immersive spaces phases (about 12:41 in the presentation) being automatically becoming inactive on the user stepping outside of the system boundary. I am curious about how this system boundary is defined? What happens if I have a mixed immersive space and want to allow the user to walk around a large room (ar enhanced art gallery experience for example) and explore, after a few steps will the space become inactive? Thanks for any clarifications.