I use Vuforia ARCamera prefab as a VR camera (World Center Mode = Device_Tracking)
This work well: I can see my 3d world all around me.
But I need to limit the rotation of my camera (ie: user can look from 60° on his left to 60° on his right, but after that, the camera must remain fixed).
Basically, I don't want the user to look behind him...
Any idea how to achieve this?