Shayne Kiekebosch , I found out that the pose still needs to be transformed though - so the matrix conversion is still useful.

Thanks Shayne, this code saved my project. The code is outdated though if you are using OpenXR. There's now a better way to compute the QR Code's pose. For QRCodeInformation, I'm adding another field called "SpatialGraphNodeID": public class QRCodeInformation { public string Data { get ; set ; } public float Length { get ; set ; } # if WINDOWS_UWP public SpatialCoordinateSystem QRSpatialCoordinateSystem { get ; set ; } public Guid SpatialGraphNodeID { get ; set ; } public QRCodeInformation ( string data, SpatialCoordinateSystem qrSpatialCoordinateSystem, float length, Guid spatialGraphNodeID ) { Data = data; Length = length; QRSpatialCoordinateSystem = qrSpatialCoordinateSystem; SpatialGraphNodeID = spatialGraphNodeID; } # endif public QRCodeInformation ( ) { } } I had to change some code to match the new constructor's signature. Then, to find the pose, I use this code instead: SpatialGraphNode node = SpatialGraphNode.FromStaticNodeId(SpatialGraphNodeID); Pose pose; if (node ! = null & & node.TryLocate(FrameTime.OnUpdate, out pose)) { if (CameraCache.Main.transform.parent ! = null) { pose = pose.GetTransformedBy(CameraCache.Main.transform.parent); } marker.transform.SetPositionAndRotation(pose.position, pose.rotation); } This snippet is from: Microsoft' QR Source Code I hate making public posts very much. However, I think this would be a very good PSA for anyone who's about to go Kylo Ren on their equipment. PS: I could clean up your code to remove any WinRT reference too, but I just have no fight left at the moment.