vrapi_GetTrackingSpace, vrapi_SetTrackingSpace, and vrapi_LocateTrackingSpace.vrapi_GetTrackingTransform and vrapi_SetTrackingTransform are marked deprecated and should no longer be used. Instead, the application should use the new Tracking Space API.vrapi_RecenterPose has been marked deprecated and should no longer be used.vrapi_GetBoundaryGeometry, vrapi_GetBoundaryOrientedBoundingBox, and so on) now return boundary status that can include ovrSuccess_BoundaryInvalid when no boundary is available.VK_IMAGE_USAGE_SAMPLED_BIT usage flag.