What s the impact of TADS display ?

[Derrick006]

Hi guys,

i figured out that displaying tads on screen (tedac or pilot mpd) creating stutter.m since 2.9.

in vr fps drops down but like 10%, 2D stable fps but stutters. 
 

What about you ? 
thanks 

 

[Floyd1212]

Yes, displaying a second viewport that needs to be rendered in addition to your main viewport will bring a performance cost.  Same with enabling mirrors.  I personally haven't noticed a difference since 2.9 in this regard, though.

When you say it stutters, do you mean just the view of the TADS stutters, or your entire screen stutters when TADS video is on the screen?

Another thread that might be relevant:

https://forum.dcs.world/topic/333405-apache-flir-vs-tv-performance-impact-81-to-14-fps-video-and-trk-file-attached/

 

[Derrick006]

Only outside stutters.

i will have a look at the tread.

thanks 

[AR_Parker]

it i turn on the video for tads from the pilot seat fps tanks very hard in vr for me

[Tepnox]

It depends on the menu settings (cockpit resolution with every frame eats the most) and it depends alot of the rendered scenery in the TADS / PNVS.

A hard case scenario is for my testing Beirut on Syria map.

When having cockpit resolution to 1024 every frame, the impact for the TADS as pilot while viewing Beirut from the airport can lead up to 20 % more gpu utilization. If you add the PNVS also, you have another up to 20 % more gpu utilization.

Switching scenery to more nature landscapes (less cities) can lower this impact to 10-15 % for each separate window (TADS / PNVS).

When you switch to 1024 cockpit resolution (not every frame), the impact in Beirut is 10-12 % more gpu utilization per window. Going to nature scenery will lower this to 7-10% per window. Quite better tolerable.

So this means, in worst case scenarios around Beirut with TADS and PNVS and 1024 res. every frame enabled you would need 40 % additional gpu utilization headroom for reaching your desired target framerate - that is quite unrealistic (maybe with the upcoming RTX 5090 series in 2025 we have this headroom). So right now we have to live with stuttering in VR in certain circumstances using the TADS / PNVS.

In short, yea the TADS and PNVS eats FPS like hell (but nothing unexpected). I trimmed my VR settings to get full 80 fps (no ASW) with the TADS enabled in nature sceneries. I will get below that target while watching cities.

In night operations it does not bother me to fall below 80 fps (I have around 45-60 fps there), because the PNVS is so laggy in VR the additional stuttering does not matter or bother me at all ;D

Edited December 8, 2023 by Tepnox