@VicariousAlex - this is very helpful, thank you! Kind of a long shot as I can't find anything using Google, but would you happen to know of any sources for Gear VR UI templates for Photoshop or Illustrator?
Thanks @VicariousAlex, could you explain 'greyboxing' a little bit? I'm assuming that means just using 3D objects as placeholders for the interface, the same ones which you'll apply the 2d assets to?
That video is quite interesting. Not exactly specific on workflow but a good overall look at UI/UX. If anyone is interested, the advice I could find was to start designing mocks in Photoshop > export assets > Unity.