Hey guys, I put this together as a reference for myself. This should be helpful if you're new to Unity and want to setup Max to it's unit system and coordinates.
It should be easy to port over to iphone since I believe this is being made in unity. Only thing is you have to fork over for the iphone version of unity :( Been learning Unity and man seems simple then gets hard :(
Usually it's used for lightmaps (example on Unity, or from polycount wiki, also on Unreal [1] [2]) . Talking about Unity, note that I'm not sure about that, maybe the detail maps are using UV2? (if a Unity user can confirm)