Something for people to try, in the case where G3D is not supported, and you are plaing in Cinema mode. Not sure if its just my imagination, but its seems like if I really increase the eye separation to around 1.8 or so with some games, it almost looks as good as G3D. Its not a substitute for G3D for sure, but something to try if you have no other option. I noticed this in alien isolation most recently. Looks really good, combined with a very wide FOV.
Seems to work better for first person games and not 3rd person, as it can make things look small.