IKinema for VR

,
Yes it is possible to rotate your avatar when the player rotates his body. To do this you would need to track the orientation of your player (you can get this info from the HMD orientation) and use that to drive the hips task of your character for instance. Any rotation of your players head will be reflected in the hips causing the whole body to rotate.

Without a tracker on the belt though, it is not possible to get exact rotation, that is just a limitation of the typical HMD/ 2 motion controller setup.

You can set the position of the HMD task in the VR IKinema Rig. You can modify the position and rotation as you need. For a detailed set up, we have a demo project here: )