High latency after DirectVR scan.

[Objectionne]

Hello, I recently started using Vorpx. I’m using a Meta Quest 2 and connecting to my PC wirelessly via Air Link. I’m finding that after performing a DirectVR scan in any game I immediately begin seeing high latency afterwards. By high latency I mean that I the game begins stuttery and when I look around by moving my head I see black in the parts of the screen that hadn’t already been rendered and it takes about two or three seconds to catch up and render.

I believe that this is high latency – in terms of the connection between PC and headset – because the FPS counter still shows 120fps even while experiencing this. The game I’ve tried are older, low spec games like Half-Life 2, Portal and Oblivion. My specs are:

GeForce RTX 3060
Ryzen 5600x
32GB RAM

I understand that DirectVR as well as using VR in general can hit performance but I’d still expect my PC to very comfortably be able to run games like Half-Life 2 and Oblivion and the FPS counter backs me up on that.

Ordinarily I don’t have latency issues while using Air Link. I’m running on an 867Mbps local network with both the VR headset and PC close to the router and I’m able to play native VR games using Air Link with a fixed 200mbps bit rate and don’t have any issues with latency or image quality. This issue only occurs while using vorpx and only while using DirectVR.

Does anybody have any ideas for what the issue could be and how I might resolve it? Thank you in advance.

[Objectionne]

To further support the idea that the issue is network latency and not framerate, I tried lowering the bitrate of the Air Link connection to 10mbps and it improved the latency greatly, although still not perfect.

For those who aren’t famiilar with Air Link, lowering the bitrate means you get a much worse image quality for the benefit of experiencing lower latency. Since the latency improved when I lowered the bitrate that’s a pretty strong indicator that the issue lies with the network connection between the PC and the VR headset. I just don’t understand how DirectVR could possibly be affecting the network connection, but it’s pretty clear that it is.

[Objectionne]

I’ve played with settings some more and will post my experience in case others have the same issue.

I haven’t been able to resolve the latency issue, but I’ve found that you can still get games to look good with minimum latency by setting a high resolution for the game and then using a Dynamic bitrate in Air Link.

For Half-Life 2 for example I’m setting a resolution of 2880×2160 and then the dynamic bit rate seems to fluctuate from around 50-70Mbps. The game looks pretty nice like this and I don’t see any real latency. I’ve tried similar with Oblivion and get the same results.

The obvious drawback with this though is that it probably won’t be effective with more modern games as I won’t be able to use a high resolution without tanking performance – more likely I’ll have to use a lower resolution *and* use a dynamic bit rate and it’ll look crummy.

Although I’ve got things to a level I’m happy with for the older games I’m playing right now, I still don’t see any reason why I should have to use a low bit rate in Air Link. I just don’t see how Vorpx could be affecting the network performance.

[Author]

Posts