This worked and it looks fantastic. I do wonder what the performance penalty is.

I think that is a huge mistake. It is not possible to do what we'd like to do in a graph. Very, very frustrating that Apple did this.

Thank you for the reply. To be sure I'm correct in understanding. We can call ARKitSession.run() when not in Immersive mode and when we go into Immersive mode it should start running? I am starting to wonder if our problem isn't ARKitSession not running but rather Immersive Space failing. We don't see any errors and it says it started but we don't see graphics. My assumption was the graphics were "somewhere" else because we couldn't find the anchor. Maybe that's not the case.