Pimax5K+ with Large FOV

[chiliwili69]

Yesterday I was trying QMB missions in non-city Stalingrad map (4 vs 4) with no clouds and running the display at 72Hz with Balanced settings.

I tested both, Normal FOV and Large FOV with Pitool RQ=1 and SteamVR_SS=80%.

 

With Large FOV I was having a solid 72 fps in almost all time, with Normal FOV the fps varied from 50 to 72. Both were quite playable and the visual quality was good in both, but I was surprised that the performance was better with Large FOV.

 

I made the calcs and the Large FOV renders 36.5 million pixel!! and the Normal 20.2 million, both number are very large. This should be too much for a 1080Ti but it is doing surprisingly well.

 

You will see that when you apply Large FOV, the number of horizontal pixels is multiplied by 1.8 factor, while vertical pixels remain the same.

 

Does anyone experiment the same?

 

 

[TWHYata_PL]

How is that possible ! Are you sure wide fov was turned on ? What map ? What version of Pitool have you reached this fps numbers ? FFR was on or off ?

[chiliwili69]

Fenris gave me the answer for this. Apparently when Large FOV is selected the horizontal pixels per eye is caped to 4096 (this is a issue of steamVR).

This also explain why the image is a bit worst than it should be.

 

Yes, I was sure LargeFOV was on since I could see the extra FOV (no black area in the edges). The map was Stalingrad in Winter, but not in Stalingrad city. using latest version of Pitool.

No use of FFR since I have a 1080Ti.

[SCG_Fenris_Wolf]

I've heard Valve has been playing dirty to Pimax with the Lighthouses (which they could not release in quite a while), and here yet again, be it consciously or not.

 

Anyway

To fix it

Go into C:\Program Files (x86)\Steam\steamapps\common\SteamVR\resources\settings\ , open default.vrsettings, find the mentioned line and put in 8192:

     "maxRecommendedResolution": 8192, 

 

 

Re-do this everytime SteamVR updates. That'll create a new max SteamVR then should serve.