Use the AR Foundation package to add high-level functionality for working with augmented reality. Unity 2018.1 includes built-in multi-platform support for AR. These APIs are in the UnityEngine.XR.ARSubsystems namespace, and consist of a number of Subsystems, e.g., XRPlaneSubsystem. Several XR Subsystems comprise the low-level API for interacting with AR. The AR Foundation package wraps this low-level API into a cohesive whole and enhances it with additional utilities, such as AR session lifecycle management and the creation of GameObjects to represent detected features in the environment.