This doesnt look right.
Are you sure you are clicking APPLY button when changing the PiTool settings?
And restarting SteamVR after doing changes?
The resolution in SteamVR, having PiTool 1.0 and Normal FOV (no PP) is around 3800x3100. On Large FOV its around 4500x3100. Nowhere near the 8200x4000 you get.
@Davebobman Wiki has this info I believe. To ensure once it is setup correctly a script setup to overwrite the setting file might be an idea.
It is too bad pitool cannot do this for the user but @anon57422158 said they can’t modify this file as part of rules from Valve. So likely the pimax experience cannot breach this “rule” either.
I remember the good old times BEFORE SteamVR implemented GPU-based quality, GPU-ranking upon SteamVR start and 3 different settings for basically the same thing: supersampling. Back then, everything worked fine. Then came the updates…
Im sure, im not doing any changes with pitool anymore. I have just launched it and made a fresh screenshot, and this values are actually same as i had when first installed pitool 2 days ago.
Set:
PiTool 1.0
Normal FOV
No PP
SteamVR SS 100%
What resolution do you see in SteamVR?
Dear @sweviver I checked @industria s values before answering him. The values he postet are correct (or: i got the same). Pitools .261 update from .260
BUT: Some other issue: i just went through all Pitools-default resolutions, and we have a problem there (PP off, changed to 50% SteamVRSS to have proper vertical resolution)
Large: 2636x2232
Normal: 2636x2232 (!!)
Small: 2188x2232
Potato: 1892x2232
So either large mode is wrong or all lower than large setting moved up one tier. I think the latter because checking the FOV in the headset potato seams to me to be small.
And that is also the reason why i was happy to use small as my standard setting last couple of days…
SteamVR version 1.13.9
EDIT: SOME MISTAKE on MY PART! Don´t know what it was. but changing between large and normal did not change the steamVr resolution. despite closing and starting steamVR again.
I checked again after pc restart:
Potato: 100% 2676x3160
Small: 100% 3096x3160
Normal: 100% 3732x3160
Large: 100% 4882x3160
Sorry to have shocked you @SweViver
EDIT2: Do we have to reboot the HMD after each size change? because i have the impression after changing the size and additional reboot the picture with the stars do change in size, too. If so, this is a quite important fact you should tell us all. unless the picture gets just resized inside the headset?
pitool ss 1.0
normal fov no pp 
big fov no pp 
big fov pp enabled 
Edit: Nvm, don’t want to add fuel to the fire. They clearly need help.
Is the latter fluent in any way, shape or form? This x2 sounds most challenging even at “just” 75 Hz.
Well, if you dont tweak your cfgs to unlock higher resolutions - this wont have any affects and you dont even need to borther yourself. It will just run in 4k with stable 75 even if its shows crazy values in steamvr. But if you do so, you will have to adjust resolution to some realistical values each time you change fov or parallel projections. In half life alyx i found its just not necessary to tune and go above 4k, it caused for me more issues than profit. But in other games it might be really necessary, like aerofly mentioned by the sweviver somewhere above.
your steamVR version must be different. i have completely different 100% resolutions
Its fresh installed 1.12.5 with latest nvidia drivers
@industria , check your nvidia card properties, try it with default. In SteamVR put less % (60-70 maybe)
We are not troubleshooting, have no issues running.
hmm, i was on steamVR beta. rolled back now. thank you for checking
Yeah, @SweViver warned about the beta.
So, after rolling back to steamVR 1.12.5, nvidia 451.48 DCH i did some checks with rebooting the 8kX after changing large/normal/small/potato i realized that the pimax-starfield background with the white circle in the middle does indeed change its size - large and normal seems the same, from normal to small and small to potato it becomes obviously smaller.
So we should all reboot the HMD after changing size or profile. Does Pitool that automaticly if i start two games with different size-settings? i doubt that.
Btw., i do now have almost same 100% standard resolution than before (different to @industria - for whatever reason):
Large: 4884x3160
Normal: 3732x3160
Small: 3096x3160
Potato: 2676x3160
Anyone wants to confirm my numbers?
Pitool 1.0
pp off
smartsmoothing off
hidden area mask on
Vive mode off
They are actually quite similar, not same, but similar. What about large fov and pp enabled?
The pimax star feild logo is a static pic that is stretched or compressed. It is the same pic from the p4k days.
@industria When you launch the game, go to steamVR -> VIDEO -> Per Application video setting -> choose your game from the list.
What resolution do you see?