Pimax 8K X with OpenXR

[Talvid]

3 hours ago, WipeUout said:

Ok, a bit of math first.  You have a pixel density of 1.5, which increases your resolution by 225% but also, you reduce resolution by 60% in OXRTK.  Assuming you have an 8kX, you are effectively reducing your final resolution at 90%, or 3456x1944 pixels.  Set pixel density to 1, and use only OXRTK to change resolution as it will be more efficient.

Unless you reduce the demand on your system further, the jitter will not go away because your GPU can't keep up with that much pixels to render.  If you want to keep close to native (100%) resolution, then you will have to consider using smart smoothing or 1/2 vertical synch (smart smoothing, but always on).  Which bring me to another important aspect: what is your HMD's refresh rate?  My 8kX is an older model that has 60/75/90 hz refresh rate and I use the lowest.  If you have the newer model, you may have 90 hz only as an option.  This means that your GPU must pump 90 FPS in order to have a smooth video and with a 3080, it is too much.  You need to use smart smoothing or drop the resolution considerably. 

The other way is to reduce DCS settings.  Disabling shadows completely, clouds to low, all the AA features off and keeping all texture low will help. 

You can also improve performance by enabling fixed foveated rendering in OXRTK, that is what I do an the performance gain is substantial.  Note that Fixed foveated rendering option in Pitool does not work in DCS, you have to use the option in OXRTK.

Getting a smooth experience in DCS, no matter what is you HMD, is a balancing act that we all spend way too much time on.  It is the price to pay for the most immersive VR experience.

Last bit of advice, Pimax is a great HMD but it requires lots of horsepower to fully enjoy it.  Save and get yourself a 4080 or 4090.

3 hours ago, WipeUout said:

 

My setting is 90hz and the highest it can go is 110 hz.  As far as I know,  since I turned off upscaling / sharpening in OXRTK the only thing enhancing the resolution is my 1.5 pixel density in DCS settings.   I just turned shadows up,  trees and buildings details all the way up,  and did a CSAR sortie on Rotorheads server with high fps.  I'm happy with the performance now.   After a full day of working through this I'm very impressed with the Pimax and i think it was well worth the money.   

Do you have a 4000 series GPU?

 

Edited March 4, 2023 by Iceman555

[WipeUout]

4080, it's in my signature block.

1 hour ago, Nahemoth said:

Is there any improvement in switching to .284 beta version of Pitool?

Stability mostly, it reduced stutters for me.  But it is the only way to have DCS native OXR work in OB with a Pimax.