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DCS and Pimax


Wags

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Hi all, trying to work through all the posts in this thread.  Good info.  i'm on the verge of pulling the trigger on an 8KX but wondering if my system will be able to run it decently.  I'm running a i9-9900K cpu and a 2080-TI GPU.  I'm currently running a Reverb G2 with no issues but am very tempted to test out the 8KX for the wider FOV and higher Rez.  Is it worth trying out or should I wait to upgrade the card into a 3080 or 3090 before trying the Pimax?  

 

TIA.  

System HW: i9-9900K @5ghz, MSI 11GB RTX-2080-Ti Trio, G-Skill 32GB RAM, Reverb HMD, Steam VR, TM Warthog Hotas Stick & Throttle, TM F/A-18 Stick grip add-on, TM TFRP pedals. SW: 2.5.6 OB

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5 hours ago, Notso said:

Hi all, trying to work through all the posts in this thread.  Good info.  i'm on the verge of pulling the trigger on an 8KX but wondering if my system will be able to run it decently.  I'm running a i9-9900K cpu and a 2080-TI GPU.  I'm currently running a Reverb G2 with no issues but am very tempted to test out the 8KX for the wider FOV and higher Rez.  Is it worth trying out or should I wait to upgrade the card into a 3080 or 3090 before trying the Pimax?  

 

TIA.  

Just note that pimax 8kx does not have better clarity than g2. Yes, it has higher resolution but all these pixels are also spread over much bigger fov.

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Thats correct. But those pixels have to be calculated too.

You can use fixed foveated rendering which is for the use with eye tracking. What it does without eye tracking is just to blur the pixels in your peripheral vision. It gives you 20 % better GPU performance. You almost dont realize it but the performance boost is worth it.

 

@VitSI had my Pimax 8Kx running with a 2080 Ti but it just could not keep a smooth experience. The 2080 Ti is almost powerful enough. But just almost. If you can afford a 3090 go for it. You wont regret it.

 

EDIT: If you purchase a Pimax 8Kx, let me know how the screen door effect is compared to the G2. ( the  pixel grid you can see when the image does not move much)


Edited by darkman222
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2 hours ago, VitS said:

Just note that pimax 8kx does not have better clarity than g2. Yes, it has higher resolution but all these pixels are also spread over much bigger fov.

 

I would not say clarity. I would say sharpness. Because the G2 is sharper than the 8Kx but the 8Kx has more consistent clarity across the lens (a much larger sweet spot) than the G2.

 

The 8Kx is a bit softer than the G2 but you can actually look around with your eyes.

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I've just received my Pimax 8K X, and have spent some time tinkering with it. 

 

I'm going to keep on editing this post as I test various settings.

 

For reference, I have a 3090 and 5900X with 32GB RAM... etc.

 

I almost exclusively fly the Tomcat, so my performance is focussed on that. In addition, due to its steam gauges, I need better visibility.

 

Test 1:

Just did full basic settings. I basically followed the preset I had for my Reverb G2, except with the 8K X I'm running native resolution. It was OK, with FPS being around 35 - 45. I had FOV wide, no smart smoothing, parallel projection disabled, render quality 1, fixed foveated rendering close. 75 Hz. It was OK. GPU went up to 99% usage, frametimes around 25 - 30ms.

 

Test 2: I tried smart smoothing. GPU usage went down, experience didn't feel good. Have now disabled it.

 

Test 3: Enabled MSAA X2. Visuals significantly better, and can read small numbers on HSD clearly. An impact of a few frames, but consider it necessary.

 

Test 4: Trying normal FOV. Doesn't feel like much of a penalty for using it at all. Had an average of 45 FPS or so, which felt very usable.

 

Test 5: Conservative FFR. Didn't notice too much of a performance degradation. FPS improved by 3 - 4 FPS.

 

Test 6: Balanced FFR. Generally OK. Little worried about shimmering at the bottom, but it was at the edge of the lenses where this are a lot more peripheral. FPS another 3 - 4, generally sitting around 50 in my test scenario, maybe a little above.

 

Test 7: Aggressive FFR. Made things too blurry and started to interfere with the ability to read small text. Though it provided 2 - 3 FPS more, the blur wasn't worth it. Shimmering too. Staying at balanced.

 

Test 8: Ketegys VR Shader. This added a solid 7 - 8 FPS to stay at 58 - 60 FPS, and generally speaking, was very good. That said, I did lose a little visual quality. I suspect this is conflicting slightly with FFR. Due to this, I will try to going back to conservative FFR for the next test.

 

Test 9: Updated firmware on headset to allow 90Hz support. No noticeable performance differences in game. (Just wanted to make sure the firmware didn't massively shift something).

 

Test 10: Went back to conservative FFR with Ketegys shader. Visual acuity improved a little, and curiously performance improved by a frame or two. For the sake of testing, I am going to switch off FFR again and see if that has any further impact.

 

Test 11: Switched off FFR. Saw about a 5 FPS drop. Visual acuity notably better in other areas, but not 'necessary.' Going to switch back to conservative FFR as a compromise.

 

Test 12: Worked on IPD offset and my personal IPD. My IPD is 68mm, so I set that as the baseline. I was feeling that when I looked at the HSD of the F-14 I was getting eyestrain. I fiddled with the IPD offset settings, and -5, 5 feels a lot better, as well as easier to read. I felt less eye strain immediately. I tried the whole range, but I could see the inside of the screen if I went too far. Happy with offset, I revisited my IPD to see if clarity changed by moving the lens. It was at its best at 68mm, which in theory suggests I did this correctly...

 

Test 13: Set to 90Hz. No noticeable performance difference or impact.

 

Test 14: 90Hz with Smart smoothing... I'm conflicted on this. The idea behind this is that there should be no problem that my card can render 45fps, and then it would fill in the gaps. For some reason it just dropped all the way down to 30FPS, which is just undesirable. Unless smart smoothing gets better and hooks to 45 FPS, I won't use it. Shame really.

 

Test 15: Render quality 1.5. Obviously better image quality, but dumped FPS(around 30). Shame since I could read gauges better.

 

Test 16: Render quality 1.25. Still too much of a performance impact it seems.

 

Test 17: Going to try FHolger AMD FSR mod. Performance went up to about 70 - 80 FPS, which is great, but visual quality really dropped. In particular, with FFR you get a shimmering effect which just makes it unworkable. Going to disable FFR and see if this improves anything. Legibility of numbers degraded.

 

 

Test 18: FSR, FFR disabled. Doesn't solve the problem with reading numbers, but shimmering on the outside has stopped. Impact 2 - 3 FPS. I realise that FSR does its own form of FFR, so I think in this scenario it's best to have either one disabled. In my view, it seems you can leverage more out of FSR.

 

Test 19: FSR, radius set to 1. Didn't make a visual difference, with a small frame penalty. I'll set radius back to 0.7 or so to be a stand-in for FFR.

 

Test 20: Set Pimax render quality to 1.5, and use FSR. This could just be just a roundabout approach of just doing the default resolution, but it could be an approach towards getting visual acuity and having a little performance. It was about 40 FPS. Gauges were easily legible, but performance was not adequate.

 

Test 21: Set Pimax render quality to 1.25. This gave about 55 FPS average. Text was adequately legible. It was nice not to have shimmering in the corners, that would usually be cause by FFR. I think this is a rough equivalent to FSR disabled, FFR conservative, render quality 1.

 

Test 22: FSR disabled, FFR conservative, render quality 1.  FPS sat at around 60, so generally superior performance. Legibility may have been marginally worse, but workable. I'm conflicted, principally because with FSR the overall image quality is better and you don't get shimmering. The Conservative FFR setting is ugly and a bit too brutal. If there was a midpoint between the FSR quality and FFR, that would probably be best.

 

Test 23: Went back to try FSR, with FFR disabled. For some reason performance has jumped with FPS at around 70, with same image fidelity as before. Clearly I'll stick with FSR over Pimax efforts.

 

On another note, does anyone find whether changing any thing in Steam's VR settings actually alters anything?

 

 

 

For reference: I also dialled down the red colours to -4, and contrast to -1. Everything feels too red!

 

 


Edited by ToastedVengeance
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Awesome setup @ToastedVengeance. I have a similar setup with the 5900x and 3090 and Pimax 8kx but currently testing the 6900XT and 5800X with the G2.

 

Going over some notes from Kevin at Pimax HQ. 

 

Try setting your ingame PD to 1.0, then setting render quality in PiTool to 1, 1.25, or 1.5.

 

"CLOSE" is chinese for OFF in FFR, conservative gives the biggest circle view, aggressive costs more frames.

 

DCS doesn't need Parallel Projections but MSFS 2020 does.

 

Go into PiMax Experience and set your IPD to your dominant eye with the mechanical adjustment, then fine tune with the software. I use the small text in Pimax Experience as a reference.

 

Have you tried running 90mhz?

 

 

 

 

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10 hours ago, FETUS said:

Awesome setup @ToastedVengeance. I have a similar setup with the 5900x and 3090 and Pimax 8kx but currently testing the 6900XT and 5800X with the G2.

 

Going over some notes from Kevin at Pimax HQ. 

 

Try setting your ingame PD to 1.0, then setting render quality in PiTool to 1, 1.25, or 1.5.

 

"CLOSE" is chinese for OFF in FFR, conservative gives the biggest circle view, aggressive costs more frames.

 

DCS doesn't need Parallel Projections but MSFS 2020 does.

 

Go into PiMax Experience and set your IPD to your dominant eye with the mechanical adjustment, then fine tune with the software. I use the small text in Pimax Experience as a reference.

 

Have you tried running 90mhz?

 

 

 

 

Cheers for the notes. I'll run through some of these and update my post. For now I just need to adjust my eyes first on the headset.

I'll fiddle with FFR more, and then when I'm happy with visual quality, I'll play with refresh rate - perhaps if it's happy with 90 it can justify smart smoothing like the Reverb?

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  • 1 month later...

I have Pimax 8kx and I am having a very bad time with edges on the rivers, sea, etc.. and the clouds on the distant even with Anti-alising at 4x and clouds to extreme. Does anybody manage to fix this? It is very distracting.

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What exactly is the problem? I mean I have a great gaming PC but DCS and the 8KX is still way too much load on the PC so everything that smoothes the images is turned down or off in my settings for maximum performance and framerate without motion smoothing. Guess thats the way it is now until in 5 years with Vulkan and an RTX 5090 Ti 😉

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12 hours ago, libory said:

I have Pimax 8kx and I am having a very bad time with edges on the rivers, sea, etc.. and the clouds on the distant even with Anti-alising at 4x and clouds to extreme. Does anybody manage to fix this? It is very distracting.

I think you'll need to experiment with different settings both in PiTool and in DCS options.As everyone's system/GPU/CPU are different as well as personal preferences  there really is no easy answer.

[sIGPIC][/sIGPIC]Patrick

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