Bigscreen Beyond 2e Vertical Diplopia

[SteeleTalon]

I upgraded my BSB to the new version recently, and got it set up a few days ago. Upon trying to play IL-2, there is a vertical offset that makes playing the game impossible. I spent nearly an entire day troubleshooting the issue and nothing worked. Internet searches and chatgpt are suggesting it has something to do with IL-2's old VR projection and the way the BSB2 angles the images. Note that the BSB2 works normally outside of IL-2, and the VR view IL-2 puts on the monitor shows no vertical offset, so the problem is between the game and the headset.

It would be great for the devs here to check into this to see if there's anything they can do on their end. I have put a ticket in with the BSB folks as well. Here's a post from the old forum about this issue: https://forum.il2sturmovik.com/topic/92444-issues-with-bigscreen-beyond-2e/

In the meantime, I had to switch back to the original BSB, which still works fine. 

[chiliwili69]

It looks this happen with the eyetraking version (BSB2e) but no with the non-eye-tracking (BSB2).

Look here, https://forum.il2sturmovik.com/topic/90790-bigscreen-beyond-2/page/2/

Neither Goldwrench nor me were having diplopia with the BSB2 non eye tracking.

Just to try, I don´t know if the eye-tracking thing can be deactivated via software. 

[WWCraven]

You can turn it off in the utility by opening the  Eye Tracking Client then uncheck the box where it says Available Models.

[SteeleTalon]

On 2/23/2026 at 2:55 AM, chiliwili69 said:

It looks this happen with the eyetraking version (BSB2e) but no with the non-eye-tracking (BSB2).

Look here, https://forum.il2sturmovik.com/topic/90790-bigscreen-beyond-2/page/2/

Neither Goldwrench nor me were having diplopia with the BSB2 non eye tracking.

Just to try, I don´t know if the eye-tracking thing can be deactivated via software. 

Hm, okay, one more thing to try. I'll see if that changes anything, thanks. 

Edit: no luck. I turned off eye tracking and still had the issue. It's interesting that the 2 without eye tracking works fine. I'll send that info to the BSB ticket.

Edited February 24 by SteeleTalon

[KaDva]

Absolutely the same problem, BSB2e, tried to solve the problem through IL-2 support, but they are not interested in our problems with our new helmets at all) so all hope for BSB developers! I tried many options: different SteamVR settings, OpenXR, OpenComposite, BSB application, complete system reinstallation) but nothing helped. Eye tracking is probably the cause of this problem. However, there is still a positive side to this option, which I was able to configure using DCS (quad views) foveal rendering with 1.5x supersampling, resulting in a stable 75 FPS (in 75hz) and incredibly clear image quality. So eye tracking really gives you a huge boost in performance.

[nicki9knuckles]

I also have the same issue with vertical diplopia in IL-2 using the beyuond 2e. I created a ticket here:
 https://il2-series.com/en/support/tickets/
@SteeleTalon @KaDva Maybe if more people submit tickets they will look into a solution for it i hope

[Picchio]

I am mostly concerned about Korea being tested and/or compatible with the BSB2e. Perhaps @LukeFF could pass the question along and let us know? We can't sleep at night! 🤣

[Picchio]

Not sure if/how this is of any help but I will gladly provide all the information I can. I just reinstalled GB for the sole purpose of checking what's the deal with the BSB2e, and I am not seeing the issue described here. Mine was a clean installation, no leftovers, so if I were to give a general suggestion it would be to check that everything interfacing with IL-2 and VR is using default settings.

[DasRaven]

On 5/5/2026 at 1:44 PM, Picchio said:

Not sure if/how this is of any help but I will gladly provide all the information I can. I just reinstalled GB for the sole purpose of checking what's the deal with the BSB2e, and I am not seeing the issue described here. Mine was a clean installation, no leftovers, so if I were to give a general suggestion it would be to check that everything interfacing with IL-2 and VR is using default settings.

I was eyeing the BSB2 as a strong candidate for a new purchase and was somewhat dismayed to read that several members were reporting an issue with GB and eye tracking , which is a function of the BSB2 that attracted me … Then I just read the above post from Picchio.

For my part I would be most grateful  to @Picchio if you could post a guide to your install process , your graphics card , driver and settings , and any additional software that you are running in conjunction with the IL2 and BSB2 software .

[Picchio]

6 hours ago, DasRaven said:

I was eyeing the BSB2 as a strong candidate for a new purchase and was somewhat dismayed to read that several members were reporting an issue with GB and eye tracking , which is a function of the BSB2 that attracted me … Then I just read the above post from Picchio.

For my part I would be most grateful  to @Picchio if you could post a guide to your install process , your graphics card , driver and settings , and any additional software that you are running in conjunction with the IL2 and BSB2 software .

Hello and thank you for the reply.

Unfortunately, for now I seem to be an isolated case: I had a few exchanges with @nicki9knuckles but we couldn't find anything conclusive.

We really need more users to test and confirm.

In my case, I did nothing special really. I'm on a 4090, 595.79, default driver settings, W11 up to date.

Never had IL2GB in this sytem so there were no leftovers of any kind (no driver settings, no OpenXR Toolkit settings, no OpenComposite settings).

No additional software either (OpenXR Toolkit installed but inactive for IL2 - no OpenComposite injection).

I am running the game through SteamVR, default settings both Global and Per-app.

I did absolutely nothing in terms of setup, just enabled VR in IL-2, launched it, tested it. From the descriptions I read and from the discussion with @nicki9knuckles the issue with vertically misaligned frames should be pretty impossible to miss, so I am quite sure I am not seeing it.

I have no abnormal eyesight, 61 IPD (57 in-headset and symmetrical, refer to BSB's guide on how to set it up correctly and why sometimes it should be a few mm less than your actual IPD); for completeness, although it should be irrelevant, I am using lens inserts with a minor correction (-1.00 R, -0.75 L).

Note: IL2 doesn't support eye-tracking and subsequently it doesn't support Dynamic Foveated Rendering. We don't know if Korea will. Other users stated that they are not encountering the issue with the non-eye tracking version of BSB2. Mine is the -e (eye-tracking) version.

Edited May 11 by Picchio

[Scrapmetal]

I haven't played IL2 for some time. I thought I'd log in here and check the VR situation before buying a bunch of modules. So looks like my BSB2e will not work with IL2? That's a shame.  I'll hold of from the purchase for now. I'd be up for some testing. I'm on an RTX 5090 and Intel 14900K. I'll fire up IL2 at the weekend and check the situation with my headset.

[Picchio]

16 hours ago, Scrapmetal said:

I haven't played IL2 for some time. I thought I'd log in here and check the VR situation before buying a bunch of modules. So looks like my BSB2e will not work with IL2? That's a shame.  I'll hold of from the purchase for now. I'd be up for some testing. I'm on an RTX 5090 and Intel 14900K. I'll fire up IL2 at the weekend and check the situation with my headset.

Do check and please report back here, we're only a few so feedback is essential.

[Scrapmetal]

I did a quick test last night. Viewing just the menu screen gives me enormous eyestrain. Is that due to one eye being misaligned vertically? Surely, there's a simple fix, like IL2 treating the BSB2e that same way it does the BSB2. Maybe this can be done in the BSB2e drivers. However, I haven't played about with any settings yet. I'll do that next and report back.

Edited May 15 by Scrapmetal

[Dash,Polder]

https://forum.il2sturmovik.com/topic/90668-il2-ingame-ipd-adjustment-finally-worked-out/

Play around with the in game adjusters, some headsets benefit greatly from using these. 

[Scrapmetal]

Turning off all DFR related stuff hasn't resolved the issue. Someone in the BSB Discord forum said to switch to using OpenXR. I'm already running that.

[Picchio]

8 hours ago, Scrapmetal said:

Turning off all DFR related stuff hasn't resolved the issue. Someone in the BSB Discord forum said to switch to using OpenXR. I'm already running that.

 

Did you try cleaning all OpenXR-OpenComposite settings and running IL2 without it?

[Scrapmetal]

15 hours ago, Picchio said:

 

Did you try cleaning all OpenXR-OpenComposite settings and running IL2 without it?

What's the best way to do that? I couldn't see any related files or directories. I tried the BSB2e on another PC that I've never tested with this headset. Same result. I still have my BSB1. No issue with that and IL2. 

[Picchio]

6 hours ago, Scrapmetal said:

What's the best way to do that? I couldn't see any related files or directories. I tried the BSB2e on another PC that I've never tested with this headset. Same result. I still have my BSB1. No issue with that and IL2. 

You can switch back to SteamVR with this (which you should have used in the first place for switching to OpenComposite/OpenXR). But if you already tried the headset on another "clean" pc and the issue remains, it might not be caused by it at all.

Which makes me think that the problem you mention with cross-eyed could be something different than the one described by @nicki9knuckles and others.

Did you open a ticket with both IL2 and BSB2 support? The least we can do is to get them to have a thorough look at this.

Edited May 18 by Picchio

[Scrapmetal]

I've never used OpenComposite for switching anything. SteamVR settings says "Current OpenXR Runtime: SteamVR". Which confirms it's using OpenXR, not OpenVR. I did just play around with the Runtime Switcher just now. Made no difference though.
I don't experience any cross-eyed issue, although it can feel like it. The left and right images are vertically not aligned.
I haven't opened any tickets yet. I'll do this asap.

Thanks.

[Picchio]

2 hours ago, Scrapmetal said:

I've never used OpenComposite for switching anything. SteamVR settings says "Current OpenXR Runtime: SteamVR". Which confirms it's using OpenXR, not OpenVR. I did just play around with the Runtime Switcher just now. Made no difference though.
I don't experience any cross-eyed issue, although it can feel like it. The left and right images are vertically not aligned.
I haven't opened any tickets yet. I'll do this asap.

Thanks.

IL2 uses OpenVR by default. If you have not used the switcher then it's still using OpenVR and not OpenXR. 

AFAIK, "Current OpenXR Runtime: SteamVR" is only relevant to IL2 after having used the switcher (which overwrites openvr_api.dll, otherwise it's ignored).

Anyway, if the same issue is present with a new install, then the above doesn't really matter (which makes me doubt about my own eyesight 🤣). Still, better to avoid further confusion on the topic.

Keep us posted in case you receive anything useful from Support.

 

[Scrapmetal]

I'll double check that openvr_api.dll is being overwritten. If it's really working for you then I'll get to the bottom of it! One way that really makes the vertical height discrepancy stand out is when the SteamVR overlay is partially covering the IL2 menu. The SteamVR overlay is fine, but the menu behind is like 🤪.