keroncoward said: 120Hz is not 120fps |
This is what they are doing
Gizmodo interview
You talked about “reprojection” in your presentation as a method by which the new headset improves the fluidity of what you’re seeing. How does exactly does that work?
Richard Marks Well, there are two ways it’s used: one is getting the motion data at the last possible moment to lower latency; and the other is if you have a 60 frames per second game and you want to display it on a 120 frames per second panel. Reprojection fills in the frame gap in-between in real time using new motion data.
SY: On a 60-frame game, you want the frame in between but you don’t have the time to render a new frame. But you can slightly move it – when you move your head this way, you move the image slightly that way…
RM: It’s taking real data – the rendering started before, but it’s just not ready to show that next frame yet, so it needs to display another 120Hz frame. It has the motion data, takes the old frame and projects it forward. It’s not exactly a pure horizontal shift, it’s more than that, but that’s the idea.