*to clarify, here is a good article…
https://developer.nvidia.com/vrworks/graphics/vrsli
Yes, true “Split Frame SLI” (where the left and right eye are rendered by each GPU) would require some monkeying with the game/VorpX. Although you would think it’s theoretically possible, since VorpX is already hijacking the pipeline… but that’s not what I’m talking about here.
I’m just talking about “Alternating Frame SLI” (where each gpu renders every other frame). I don’t believe this requires any special engine code, and should just work with any game (including VorpX).
Basically you’re trading slight latency for framerate, but the higher the framerate, the less latency, so it CAN work in certain situations (especially with brain/time warp smoothing out head movement).