DCS and reprojection ghosting

[Slo-Mo]

On 1/29/2021 at 12:02 AM, impalor said:

Ok. I think the reason for dropping 20 FPS from my low range is that WMR reprojection comes with heavy CPU overhead. Since I am more CPU bound than GPU at heavy scenes, enabling reprojection hurts more than helps. Especially when trapping wires or refueling with other planes nearby - every low range FPS counts. 

 

Same with the Shaders Mod - I see no FPS benefit whatsoever, just long loading times. So I ditched both of them.

 

Ditching MSAA, rather than reducing SS below 100%, helped upper range FPS high in the air, when I become GPU bound. I can ignore shimmering runway and carrier lines for better WVR experience and sharp looking cockpit. P51 vs P51 quick mission is now flyable, with 60 to 90 FPS.

 

I will wait out this year and look into building new rig after Vulcan comes online and dictates, what's important. 

 

 

Hello impalor, 

 

You seem to have very good understanding of your system, setup and all the different options within and outside of DCS and therefor you probably have tried this as well - but just in case I will share it with you in the unlikely event that you have not tried it. Set Virtual Reality pre-rendered frames to "Use the 3D Application setting" in the NV Cotrol Panel. This really helped me with the ghosting effect in both IL-2 and DCS. Ghosting is practically gone and the ride a lot smoother in both games. Note, I do not use reprojection mode and I have a really powerful system (5800x and 3080) so I am not sure if this will do anything on your rig or not. But might be worth a try if you haven't tested before.

 

Cheers

[VitS]

This reprojection ghosting is definitely something inside DCS engine. Oculus, SteamVR and WMR all have this ghosting. Even settings supersampling to super lower value, so low that frametime is about 2ms, and forcing motion reprojection results in ghosting. So it's definitely not CPU problem.  Not to say that other games don't have that.

[TAW_Impalor]

Agree. I don't see ground ghosting in IL2 when rolling, with or without reprojection. In DCS - always, even with the absolute minimal settings. So the thread title should be simply 'DCS ghosting', reprojection has nothing to do with that. No CPU affinity or pre-rendered frames parameters can fix that.  

[captainHelmet]

I see ghosting as well, or at least some sort of offset between the eyes even with reproduction disabled. 

[joji]

Still problem in 2022. Could it be caused by DCS jets moving way faster than IL2 warbirds?

[PD919]

18 hours ago, joji said:

Still problem in 2022. Could it be caused by DCS jets moving way faster than IL2 warbirds?

I notice it more in warbirds than jets because most jets combat is at a distance.

[joji]

True but jets while merged in dogfight are close together and are moving much faster. Anyway I think I know why this is happening. I think it is FPS related. Even if I turn everything to LOW/OFF I still get ghosting but after I lowered pixel density from 1.0 to 0.7 the game runs much smoother and the ghosting is gone. The down side is that pixel density is very important for good looking graphics. DCS definitely needs a lot of optimization. IL2 BOX used to have the same problem but they fixed/optimized it quite some time ago.