Just downloaded the latest Google Cardboard SDK for Unity from here: https://developers.google.com/vr/unity/download
All the tutorials I have seen (including Google's own) talk about dragging the GvrViewerMain prefab into the Hierachy. However, I have searched all the google VR assets included in the download and GvrViewerMain is not present. Anyone know where I can download this from or which Prefab to use instead?