I tried the game briefly with a unity 5 based profile and both G3D and Z3D seem to be working fine.
I’ve added a Fishing Planet (G3D) profile to the cloud with HUD and shadow shaders assigned to the vorpX menu options. If the offset shadows bother you, the vorpX menu can turn them off.
Immersive screen is default recommended due to the game’s limited FOV, and the mouse rotation lag may not translate comfortably for fullVR mode headtracking. But you can try it if you want.
Don’t expect it to feel like native VR, but it is still immersive with the 3D big screen.