Prepar3D Forums

I recently upgraded to Windows 10 home edition and reinstalled Prepar3d v4. Prepar3d works great without the Oculus Rift enabled but as soon as I enable the Rift, everything stutters extremely bad. As soon as I close Prepar3d, the Rift works fine.

The Oculus works fine in other simulations such as IL2 with no issues as well.

There is something causing this stuttering/lag within the Prepar3d program and cannot seem to locate the culprit.

Any help would be appreciative.

Hello,

Have you gone through the general debugging steps?
https://prepar3d.com/forum/viewtopic.ph ... 2&t=123246

Regards,
Kayla

Hi!

You have very bad fps with your settings - guiving bad / stuttery experience in VR.

Sim objects (your plane, traffic, the world's objects and autogen objects, weather) put a very higher load on the first cpu core (main rendering thread) in VR compared to a screen (in P3D).

If you have a hyperthreaded cpu (intel i7 or amd ryzen with smt) you will help a lot your experience in VR and P3D by turning hyperthreading off in bios (this gives more "capacity" to the main rendering thread).

Than, if you want at least 45fps+asw with your Rift (smooth enough experience) you'll have to reduce settings (scenery/autogen objects, shadows, weather) compared to smooth screen settings.

Toutenglisse,

The Oculus Rift worked beautifully prior to upgrading to Windows 10. I was using Windows 7 and had no issues with the VR. I don't even get to the point where I can turn on the VR to fly.

I've uninstalled the program and deleted all files that remained. I installed the sim and tested the Rift prior to doing anything or adding anything further and still having the same problems.

Again, the Oculus works fine even when Prepar3d is open, it craps out when I go to fly. I don't even turn on the VR and the bad stuttering appears.

It seems that the only difference that I can see between Windows 7 and Windows 10 is that Windows 10 is using DirectX 12. Could that be the issue?

you upgraded windows? meaning you updated on top of windows 7 to 10 or you formatted the drive and did a fresh install? Only reason i ask is that i too have the rift and had severe issues from "updating" but it worked flawlessly when doing a fresh install.

I did a complete fresh install. All programs were installed after the install of windows 10.

This is very strange, as soon as I load a flight, the Oculus goes haywire. As soon as I shut down prepar3d, the Oculus works fine.

i have same problem

Hi, I bought oculus rift, it works fine, but when I use it with prepar3d v4.3 it behaves strangely, when I open the virtual reality prepar3d works in jerks, while if I open another program at the same time, prepar3d becomes fluid, but in this way I can not use preapr3d because the airplane's commands do not work, I have also reinstalled the oculus program. My Pc have: i7 7700K, gtx1080Ti, 16gb ddr4 3200 mhz ram, ssd samsung, motherboard Msi z270. I hope in you help.