I am saying that MSAA doesn’t work with deferred rendering and that’s the AA you want to use in VR. There is a fork of UE4 by Oculus with forward rendering and MSAA I think, but you’d have to build it yourself.
There are bunch of other AA (check new DOOM) methods, but since Epic works on projects that do very well with current solution, they don’t have time/resources/incentive to go after yet another AA method. CryEngine’s AA is on GitHub, so you can implement it for UE4 yourself 