Crepuscular rays (sun rays) in VR missions: Loss of -25FPS..[SOLVED]

[katdog5]

The crepuscular rays / sun rays / god rays are absolutely stunning in sim. the trade off is -25FPS ? Ouch.

 

And is remedied when you fly above the clouds...

 

Anyone else experiencing? Possible solution?

 

 

EDIT: Sun rays over city with multiple aircraft and battle scenes, explosions etc

 

 

[sOLVED] Dynamic Resolution Factor set to .8  fixes the issue

Edited December 11, 2017 by katdog5

[56RAF_Roblex]

I cannot say I have ever noticed an drop in FPS.   Next time I see those rays I will look at my framerate.

[=TBAS=Sshadow14]

How do you know its just the rays?
Not the terrain/ground textures / tree shadows that cause the fps hit?

just curious
as there is no way to toggle them on or off for testing properly

[katdog5]

This is good news if its just me. Im guessing dynamic resolution factor may help me as I have mine set to full. Ill try to notch it down. Just never thought of it

 

Good point shadow. could be. 

 

Yes, the few times it happens it is during campaigns where there is a lot going on. However very similar scenarios where its very cloudy my frames are ok. Also when I fly above the god rays, frames come back. Thats why Im guessing/polling

 

Poll to anyone using VR:  Is your dynamic resolution factor set to full in VR? 

Edited December 10, 2017 by katdog5

[Madmatt]

katdog5, I don't think the dynamic resolution factor slider has any effect when playing in VR. I may be wrong, but I am pretty certain I did read that.

 

Madmatt

[katdog5]

katdog5, I don't think the dynamic resolution factor slider has any effect when playing in VR. I may be wrong, but I am pretty certain I did read that.

 

Madmatt

Interesting. I read that it does specifically in VR. (Even though it ignores the set target fps setting in VR)

 

Per the update under the explanation , "so this feature is especially useful in VR"

 

https://il2sturmovik.com/news/303/update-2009-vr/

Edited December 10, 2017 by katdog5

[Madmatt]

You know what, The part about the target FPS is probably what I read and remembered. Very interesting...

 

Madmatt

[katdog5]

Sure enough, the obvious fix is in. Well done devs. Guess I just didnt ever see this detail. I was thinking with you matt, always thought to have this setting as default lock. glad I saw that little sentence

 

For me, the rubber hits the road with dynamic resolution factor at .8 where the issue is essentially fixed

 

went from 65/71stutter fps to 89/90 smooth. cant seem to really recognize a difference in graphics either. the god rays are glorious

 

If anyone else has this issue, test for your self with these "quick mission" parameters:

 

Spitfire vs 4 He-111s starting at ~1000m

17:00

Winds 6 m/s

Turb 1 m/s

Weather Heavy

Clouds 2700

Directly over Stalingrad Autumn.

 

A real doozy for FPS testing.

Edited December 11, 2017 by katdog5

[56RAF_Roblex]

I saw those sunrays tonight and I checked.  There was no drop in FPS.

[katdog5]

I saw those sunrays tonight and I checked.  There was no drop in FPS.

Only in VR, high settings.

[chiliwili69]

 

 

dynamic resolution factor at .08

Do you mean 0.8?

 

As per devs the limits are 1.0 and 0.5. Never tried that. But one day I have to try it. 

[katdog5]

yes chili. will edit. thx

[Guest deleted@134347]

katdog5, I don't think the dynamic resolution factor slider has any effect when playing in VR. I may be wrong, but I am pretty certain I did read that.

 

Madmatt

 

it does, I've noticed the effects and they pretty much make everything blurrier. The challenge with this setting in VR, however, is that VR tries to maintain 90fps at all times. So whenever your VR isn't at 90fps that setting will kick in and will stay until the scene is back to 90fps. In my setup with 88-90fps, i.e. not constant 90fps, the resolution drop caused by this setting was pretty much permanent.

[dburne]

Info on Dynamic Resolution from the Game Update 2.009 notes from Han:

 

 

Dynamic resolution factor is a new method for keeping your frames per second (FPS) steady. Its value can be set from 0.5 (half the original resolution) to 1.0 (full resolution). If you set it to 1.0, you'll be turning it off and everything will work as before. If you set it to a lower value, you're telling the game it's Ok to degrade the rendering quality to this value to keep the FPS close to the value you set in Target FPS drop-down list here. So if you set Target FPS to 144 and Dynamic resolution factor to 0.5, the game will lower the rendering quality up to 0.5 of the original resolution trying to keep that high frame rate you specified. You can experiment with these values to find out what FPS you can achieve on your PC without degrading the visual quality too much. On a regular monitor, quality degradation is more apparent than in VR HMD, so this feature is especially useful for VR.

 

Please note, that Target FPS value is ignored in VR - it is set to HMD refresh rate (90 FPS or 45 FPS when it is lower than 90 and HMD driver automatically engages ASW if you're using Oculus and Reprojection for Vive). You can Google what these technologies do - basically, they generate new frames depending on previous ones to show you if PC performance level is insufficient to output 90 FPS. Target FPS parameter is also ignored if you use a regular monitor and check V-Sync option here - in this case it ties to your monitor refresh rate.

 

 

I myself just leave it on 1, as my system seems to be able to handle it fine.

Edited December 11, 2017 by dburne

[katdog5]

Yep, not ironic that the 1080ti is 24% faster than the 1080gtx...mama mia

http://gpu.userbenchmark.com/Compare/Nvidia-GTX-1080-Ti-vs-Nvidia-GTX-1080/3918vs3603

 

 Any reason why you highlighted those targeted fps sentences? Right, you cannot set your own personal targeted fps in VR

[SCG_Fenris_Wolf]

I should have put 200€ more in to get the 1080ti