For some use cases, it might make sense to combine Unity’s AR Foundation with Vuforia Engine in the same Unity application. Currently, it is not possible to use both in the same Unity scene, but they can be used in the same app in separate scenes. As an example, you might want to leverage ARKit’s Environment Probes in one AR experience in your app and use Vuforia Model Targets in another scene.
For this method to work, set up two separate scenes, one with AR Foundation objects and components (e.g. AR Session Origin, AR Session, AR Point Cloud etc.) and another one with Vuforia Engine objects and components (e.g. ARCamera, Image Target(s), Model Target(s) etc.). If you haven’t setup Vuforia Engine before, please follow the guide in this link.
After you have your scenes set up, make sure to add them to the Build Settings. To change between the Vuforia Engine and AR Foundation scenes, you can simply use the following code snippet: