Task: smooth flight without microstutters

[Motomouse]

Task: butter smooth L39 single player free flight caucasus

intuitive ingredients:

SMT (hyperthreading) off                        *  not important if I stay in GPU VRAM and bandwidth (resolution) limits

Nvidia driver prerendering 4 frames       ***

Limit DCS to corecount -1 CPU cores     **

 

counterintuitive ingredients:

Nvidia driver: multithreading off             ***

High DCS Settings                                   *** 

    (High Textures & High Terrain & Visib. Range Extreme & High Shadows & SSS & Max preload & Max Trees & Max Scenery)

 

Result: success

 

Tested on:
5600 & 3080 & 64GB & Varjo Aero 39 PPD 35 PPD & Varjo-foveated default settings @ 45 FPS sync

 

Try it (especially the counterintuitive steps) if you do not believe it

(Legend: *, **, *** how much does this step contribute to a smooth experience)
 

Edited October 28, 2023 by Motomouse

[Gun Jam]

did you try core unparking?

[Motomouse]

Thanks for your advice. I already used core unparking prior to these steps. I would rate core unparking also as ***

Edited October 27, 2023 by Motomouse

[speed-of-heat]

I just tried each of them, other than turning off SMT, there was no measurable performance difference, on my 12700k/4090 running the Apache, hot start in Syria. So it could be hardware or it could be the specific scenario...

[Motomouse]

Just to be clear it is not about absolute performance, but about removing sporadic small stutters in sharp turns or rolls, or while LOD change of scenery and popping up of new regions.

Edited October 27, 2023 by Motomouse

[Motomouse]

What is smooth in the L39 is not in the F15.

I can keep the high DCS settings but i have to reduce the render resolution to 35 PPD to get a really smooth experience in the F15 on my system

At 35 PPD ("Standard" Aero resolution) I can look sideways at airports flyovers without inducing stuttering again in the F15 like I am able in the L39 at 39PPD. (39x39) / (35x35) eq. round about 1.24 that is about 25% less pixels rendered. Picture quality at 35 PPD is still very nice and miles above the Reverb.

Besides the VRAM it seems I have to care for the bandwidth limits of my 3080 as well in my settings.

By the way I enjoy optimizing my settings for my system in itself

 

Edited October 27, 2023 by Motomouse

[Motomouse]

[Motomouse]

Textures Medium & Terrain Textures Low to stay in my 3080s VRAM limits

Shadows Low & SSS nice visual with little performance impact

SSAO the focus window of Varjo-foveated is nearly invisible with ambient occlusion and my other settings

Visib. Range Extreme this has funnily virtually no performance impact on my 5600&3080 system and looks gorgeous

Anisotropic Filtering x16 for the sharpness and the runway details

 

Varjo Aero 35 PPD & Varjo-foveated default settings for a reasonable render resolution and not exceeding GPU bandwith limits

 

With these settings I enjoy single and multi player in all aircrafts with nice visuals in the great 45 FPS sync mode of the Varjo Aero

 

If you exceed VRAM limits you will encounter massive single digit FPS stuttering

If you exceed reasonable render resolution/memory bandwith of your GPU there will be shorter stutters and jumping visuals when you look to the side 

 

(If you are on the lookout for your own opimal settings the ingame FPS counter can also provide the necessary VRAM info.)

Edited October 28, 2023 by Motomouse

[Nedum]

On 10/27/2023 at 3:11 AM, Motomouse said:

Task: butter smooth L39 single player free flight caucasus

intuitive ingredients:

SMT (hyperthreading) off                        *  not important if I stay in GPU VRAM and bandwidth (resolution) limits

Nvidia driver prerendering 4 frames       ***

Limit DCS to corecount -1 CPU cores     **

 

counterintuitive ingredients:

Nvidia driver: multithreading off             ***

High DCS Settings                                   *** 

    (High Textures & High Terrain & Visib. Range Extreme & High Shadows & SSS & Max preload & Max Trees & Max Scenery)

 

Result: success

 

Tested on:
5600 & 3080 & 64GB & Varjo Aero 39 PPD 35 PPD & Varjo-foveated default settings @ 45 FPS sync

 

Try it (especially the counterintuitive steps) if you do not believe it

(Legend: *, **, *** how much does this step contribute to a smooth experience)
 

 

Sorry, but something with your system must be wrong, if extreme visibility adds more "smoothness" to your system. How could it, if it adds more CPU and more GPU stress?

I tested all your settings and nothing did things better, most of it did the opposite.

What I've found out on my system and the systems of my friends: if possible, disable all system tracking tools. Do not use any overlay (like Afterburner) and disable Process Lasso if present.

There is no setting in the nVidia control panel and no "magic" setting in DCS, that will remove problems with DCS or add some hidden superpower.

I tested all the "magic" stuff I and others could imagine until my eyes starts bleeding, and there is no hidden magic or superpower.

If there are stutters or other issues with DCS, it's DCS itself (bugs) or the system on which DCS is running.

"A good and stable running system will fix most of the DCS issues."

[Motomouse]

Thank you for your insights. I concur with the majority of the perspectives you've shared.

However, I believe my experience, being a Varjo Aero user, leads to a different situation from users of other VR headsets. One of the standout features of the Aero is its 45 FPS mode, which I personally prefer, for instance, to the 60 FPS mode offered by the Reverb (I think the Reverb flickered a little bit at 60 FPS, I do not have this experience in the Aero). I've observed that users of other VR headsets generally target 60 or 90 FPS.

Since my target is set at 45 FPS, I have the luxury of operating in the "Extreme visibility" mode. My intuition is that the heightened experience isn't necessarily only due to a more stable FPS rate. Instead, it's the minimized environment rendering changes, such as pop-ins or Level of Detail (LOD) adjustments in proximate regions, which make the experience appear smoother as well.

To clarify further, when discussing "smoothness" in VR, I think it's essential to distinguish between:

1. consistent framerate, and
2. steady visual experience.

Edited October 29, 2023 by Motomouse