I made a free plugin to have AR in Vive Focus in Unity
I have always wanted to experiment with AR on the Vive Focus, so I modified the CameraTexture sample and I managed to obtain a prototypical implementation of augmented reality. I then created a package out of it and I shared it on GitHub. I talk about these experiments on my blog .
If you are interested in this, download the GitHub project and have fun with AR on the Focus