Pass or not pass in vr??

[DeltaMike]

For the record I agree with edmuss here. FSR in ultra mode (0.77) with high textures is gonna look pretty awesome. 

Edited March 16, 2022 by DeltaMike

[PLUTON]

ok I will try tomorrow there it and 0h35
thank you gentlemen, it's nice of you to help me.

[PLUTON]

Whether with an adjustment of 0.75, or 0.77
Textures remains set to medium because as soon as I switch to high textures I go to 15 fps and if I go back to medium I turn to 41 fps.
I'm not expert enough on the subject to know why it is like that.

Should I upgrade to 0.73 or 0.71?

[PLUTON]

I set su150% in steam vr
fsr 0.75 but still Texture Medium in
in dcs array

[DeltaMike]

This has been a source of friendly debate, but, I'd suggest setting steam to 100, pd 1.0 and let FSR do the work. If you do that, with a scale factor of 0.77, your DCS frame size should be about 60% of native, which should give you some headroom (you're at 90% now). 

Performance is a function of DCS frame size, which is

(3100*3100) * (steam general %) * (per app %) * pd^2 * ScaleFactor^2

Suffice to say -- the more of those terms you set to "1" or "100%" the easier it is to not get totally lost

 

 

 

Edited March 17, 2022 by DeltaMike

[PLUTON]

I'm going to do some tests and I'll be back.

[PLUTON]

depuis la mise a jour d hier (2.7.11 ) quant je lance DCS et jusque la tout va bien je commence a rouler et la steam vr s arrete et un message (run dll ) s inscrit qu une erreur c est reserve et dcs s'arrête automatiquement aussi et cela autant de fois que je relance

besoin d aide svp

a savoir qu'avec DCS stable cela fonctionne toujour donc je pense qu'il y a bien un lien avec la mise a jour

[DeltaMike]

2 hours ago, PLUTON said:

depuis la mise a jour d hier (2.7.11 ) quant je lance DCS et jusque la tout va bien je commence a rouler et la steam vr s arrete et un message (run dll ) s inscrit qu une erreur c est reserve et dcs s'arrête automatiquement aussi et cela autant de fois que je relance

besoin d aide svp

a savoir qu'avec DCS stable cela fonctionne toujour donc je pense qu'il y a bien un lien avec la mise a jour

Three years of college French and I'm still such a baby!  

If I understand correctly, I think you need to uninstall FSR, repair your DCS install and then re-install FSR.

We go through that drama every time we upgrade. Mod managers make that process a bit less painful

[edmuss]

Yup, the upgrade will typically break any mods you have installed, using a mod manager like ovgme makes it super easy to reapply and enable/disable mods.

I did three years of French at school, 31 years ago. I was rubbish then and I'm even more rubbish now
 

[PLUTON]

So if I understood correctly I should have uninstalled FSR
before updating?

And FSR is the three small files in viperfkit which goes in the bin folder of DCS?

Or am I dumb and I didn't understand anything!

par contre j ai reglé a 100% et mis le casque a 60Hz
et fsr a 0.75 et j ai plus de bégaiement et le sintillement disparait a 1000 piéds ,pour l instant ca cour a 40/42 fps et c ets fluide .
Moi ca me va

[edmuss]

You don't need to uninstall mods, typically an update might overwrite any files that may have been modified for a specific mod, this is when you need to reinstall the mods.

You're correct with the three small files from vrperfkit in the dcs/bin folder.

With 60Hz, 100% resolution and FSR 0.75 you should be nice and smooth if motion smoothing is on, if it's off, at 40fps you will likely be starting to get stutters if you look out of the side of the cockpit at low level; at higher altitudes it will probably me absolutely fine

[PLUTON]

Yes motion smoothing is enabled
and the flight is fluid (can do better) but I think we have to wait
on Vulkan or other DCS settings.
Thank you for your help gentlemen, it was very useful to me.

[PLUTON]

Another question ,
does ReShade_Setup_4.9.1 work in vr?

[DeltaMike]

There's the CPU side, and the GPU side.  They are related, to the extent that DCS has a lot of objects with a lot of detail running around at any given time. 

Once you get into multiplayer you'll get real sensitive to the CPU side of things.  So far we've been more or less keeping the CPU out of it.  

In single player, especially on the Caucasus map, your performance is mostly about how many pixels you can render.  Driving a  G2 is challenging; it has a LOT of pixels.  In order to run it at native resolution you have to render about 9.3 million pixels.  Only three GPU's on the market can do that, maybe four if you count the 6800XT.  

Textures may be a different matter, interesting comments on that here.  I've always thought TMU count had a correlation with DCS performance, and the 2080 doesn't have a ton of those relatively speaking.  I'm not totally sure that lowering your pixel count is going to get you there as easily as lowering your texture settings, as you are doing.  Let me know what you decide, I'd be interested to know.

As for AF, we all kind of have the idea its "free" although nothing is free in life.    I've seen estimates that it can take up to 20% of your GPU power to max that out.  AF affects how textures look at a tangent, you can see the effect most easily by looking at runways.  You'll have to figure out how much of that you want to live with.  

Net of everything, I think you were right to begin with, at this point probably best to dial textures and AF down until you can get it running how you want it.  

Getting back to the pixel count.  There's an easy way and a hard way to regulate the number of pixels you're rendering.  The easy way is with the Steam Global slider.  The hard way as you've seen is with FSR, which is a little more complicated than it needs to be.  Now you have at least four knobs to twiddle!  Easy to get yourself twisted up.  

If FSR is frustrating you, it's OK to set it aside.  Among other things, if you can find a Steam resolution you like, we can calculate the equivalent ScaleFactor if you want to do a simple A/B test.  

I don't think DCS does a bad job of throwing pixels on a screen, there's only so much you can do with 9 million pixels.  The biggest headache in DCS is on the CPU side, where everybody wishes we could use more than a couple of threads at a time.  That does affect VR performance -- your poor CPU has to do the math twice for each frame -- but that's another rant for another day. 

Good news is, once you get your frame size (total pixels rendered), texture quality and AF squared away in single player, those settings will carry over into multi-player.  In MP you may have to adjust vis range, trees, shadows, water, cloud settings.  May have to upgrade your CPU or RAM.  But at least your GPU won't go out of tune just because you jumped into a server.  

You're pretty much there, really.   If the low textures look OK to you, you're in business.  

 

ETA:  I think reshade 5.0 was the first to have native VR support.  There were some mods for earlier versions but not much point in that, 5.0.2 is pretty slick.

Edited March 19, 2022 by DeltaMike