Confused about Marker-Based LBSS features APIs

[ChrisMa130]

On the tutorials posted on this forum, it doesn't mention anything about calling any methods within Unity or Unreal. However, on the tutorial listed on the Vive LBE website, it says we need to call corresponding APIs.

I am asking this because the APIs don't work: I am doing PCVR and using the latest Vive OpenXR plugin, and the current tutorial listed on the Vive LBE website still uses OpenVR Loader to function. There is no way that I can call that API on PC using the latest Vive OpenXR plugin. 

So, my question is can Marker-Based Scene Alignment, Location-Sharing and Drift Prevention work without calling any APIs in my PCVR game?

[deSchot]

I'd be keen to know if you got any resolution on this issue @ChrisMa130