[chmod775]

> Would it be possible for players to have unique camera perspectives when split, and then reorient to the same perspective when within a given distance to transition to single screen?

Technically, yes. There's not any major technical hurdle here. You'll probably have to render a bit more than required for each screen, so your shaders don't create seams near merge (because they may behave differently at the edge of whatever they're sampling). Also you'll have to decide what you want to do about on-screen effects (hit notifications etc) on merge. You may get something that looks like seams to our brain's pattern recognition anyways as you get close to merge (a "triangle" looking shape on floor/walls when perspectives only slightly diverge). I suspect the latter is why the game you mentioned had a transition - besides providing a visual to each player that they can now also look at the other half of the screen.