John Carmack has mentioned on Twitter that he spent a lot of time trying to make the frame release rate more consistent even with purpose-built VR hardware. I t

John Carmack has mentioned on Twitter that he spent a lot of time trying to make the frame release rate more consistent even with purpose-built VR hardware. I think game programmers found it easier to go with the gsync/freesync method of doing a vsync whenever the frame is ready instead of trying to hit a deadline.