Now that the ARToolkit package is downloaded we can import it into our Unity project. In Unity, do the following:
- Go to the Main Menu
- Click on Assets | Import Package | Custom Package..., find your ARToolkit Unity package file
- Import the files into your project.
These steps may be very familiar since they're common any time you import a third-party package into Unity and were detailed previously for Vuforia (please refer to the previous instructions, if you wish).