Stuttering badly in VR but only in the Kola map in (mainly)fixed-wing aircraft.

[cobrabase]

Greetings all,

 

I'm not sure where to exactly post this issue that I have but it is in VR so here goes.  I have a Reverb with a 3080 video card.   Frame rates are steady in the Kola map for me in helicopters with only minor issues.    In fixed-wing aircraft I have horrible stutters only in the Kola map with even drops to zero framerate as if the sim is loading something in.  The sim will work its way through the issue and resume moving only to have it happen again. 

Scenario 1:  F-16 at altitude near Bodo.   High enough to see the excellent topographic relief of the map; about 18,000 feet.  Flying straight and level gets stuttering to even momentary freezing in the motion of the sim.   Turning the aircraft or rapid climbing leads to horrible stuttering.  The effect is greater at high altitude not so much at low.  

Scenario 2: This one is the weirdest.  F-16 on Bodo's taxiways traveling straight - normal FPS.  Any yawing motion and the sim stutters to a halt for up to 30 seconds!  Brief movements again turning,  a freeze, a few degrees of a turn, freeze.   It's so strange and annoying.  Why during yawing on the ground while taxiiing?   

Scenario 3: Near the physical Bodo tower.  This happens with both helicopters and fixed-wing aircraft on the ground or in the air.  If I get within about 500 meters of that tower and small parking area the stutters are identical to the ones in scenario #2; absolute freezes for many seconds before the action switches back to being silky smooth PROVIDED I move away the tower.  It's like there is this zone around the tower where this happens. 

All three scenarios appear to be related.    

I have tested and replicated these over and over again over the last few months.   Anyone have solutions for me to try?  Anyone have any ideas?   It is ONLY with the Kola map.   Thank you gentlemen.  

Edited September 13, 2024 by cobrabase

[The_Nephilim]

maybe post a trk file and a dcs log file

[Spetz]

Edit **** What’s your terrain preload set at? Try lowering it below 55000 and see if it make a difference. Does on my system. 

Edited September 22, 2024 by Spetz

[Phantom711]

@Spetz

Uhm…I thought it was the other way round…the more you preload, the faster it can be accessed during the mission, because it is loaded into RAM already.

[Spetz]

Technically yes, the more you preload the less chance you have of stuttering during mission flight BUT initial load can be much longer and having your preload maxed means more RAM is used removing that from anything else DCS uses it for. I personally have my preload at 55000 (which I think equates to 55km), and depending on map flown, I’ve seen DCS use as much as 28gb of RAM out of my 64gb. For me lower preload just works better. 

Edited September 22, 2024 by Spetz

[Mr_sukebe]

Similar to the above, I found that preload at around 45% was a good compromise with a 3080ti

[Baltic Pirate]

On 9/13/2024 at 7:36 PM, cobrabase said:

Greetings all,

 

I'm not sure where to exactly post this issue that I have but it is in VR so here goes.  I have a Reverb with a 3080 video card.   Frame rates are steady in the Kola map for me in helicopters with only minor issues.    In fixed-wing aircraft I have horrible stutters only in the Kola map with even drops to zero framerate as if the sim is loading something in.  The sim will work its way through the issue and resume moving only to have it happen again. 

Scenario 1:  F-16 at altitude near Bodo.   High enough to see the excellent topographic relief of the map; about 18,000 feet.  Flying straight and level gets stuttering to even momentary freezing in the motion of the sim.   Turning the aircraft or rapid climbing leads to horrible stuttering.  The effect is greater at high altitude not so much at low.  

Scenario 2: This one is the weirdest.  F-16 on Bodo's taxiways traveling straight - normal FPS.  Any yawing motion and the sim stutters to a halt for up to 30 seconds!  Brief movements again turning,  a freeze, a few degrees of a turn, freeze.   It's so strange and annoying.  Why during yawing on the ground while taxiiing?   

Scenario 3: Near the physical Bodo tower.  This happens with both helicopters and fixed-wing aircraft on the ground or in the air.  If I get within about 500 meters of that tower and small parking area the stutters are identical to the ones in scenario #2; absolute freezes for many seconds before the action switches back to being silky smooth PROVIDED I move away the tower.  It's like there is this zone around the tower where this happens. 

All three scenarios appear to be related.    

I have tested and replicated these over and over again over the last few months.   Anyone have solutions for me to try?  Anyone have any ideas?   It is ONLY with the Kola map.   Thank you gentlemen.  

 

Any improvements with the stuttering. Incidentally I’ve got exactly the same issue. 4090, and reverb g2.

I reduced the preload to 55000 and stuttering is noticeably less. Flyable. Did some other tweaking as well… small changes in settings. Totally flyable.

Edited November 2, 2024 by Baltic Pirate