8k+ first user impressions by @neonrazor

You seem to be confused :wink:. You may want to read this (https://community.openmr.ai/t/how-the-render-target-resolutions-and-the-supersampling-factors-of-pimax-and-steamvr-work-together/19506).

Regardless the confusion, 2562 x 2106 is suspiciously low. The regular 5k+ in Normal Native mode (without the PP) is recommending 3200 x 2632.

At this res, it should not affect the result.

Assuming that 5k+ is already maximizing the utilization of the panel, then having the new 4K panel of the old 5k+ panel size is the only option to utilize the same FOV and the optics. Smaller panel at the same distance with limit the FOV, at the closer distance will require different lenses (focused at the closer distance).

I do not believe the vertical offset should impact the res, it should just shift the virtual camera vertically, but using the same viewing frustum (which define the res). I cannot confirm that though as any PiTool version > 132 is not working very well for me and I am stuck with v132 (which does not have vertical offset option).

@neonrazor, @yanfeng could you run hmdq on the 8K+ and send me the results? (Here is how Contributing | HMD Geometry Database).

5 Likes

I understand your point, but I’m not sure that’s how it’s implemented. Regardless, I have 2 different vertical offsets (3 and 8), since my eyes don’t quite line up. I think that would have to expand the res, for consistency between each eye’s view.

3 Likes

You can run hmdq on your setup and check the corresponding values (viewing frustums and eye2head transform matrices). This will tell you exactly how it works.

5 Likes

The 8k + and 8k X have higher resolution in vertical and horizontal … just as a reminder it was 2560 * 1440 On the 5k+ and now is 3840 * 2160 and usually for me it’s higher in steam For my 5k like @risa2000 said.
Edit : so @yanfeng is closer but still a view pixels missing on x*y per eye.

@SweViver, what resolution did you use?

1 Like

How Pimax have “optimised” panel usage as we know that lenses are exactly the same ?
The ~15% better utilization probably comes only from smaler panel size which they choosed for full RGB model.

2 Likes

@neal_white_iii : Pitool 0.75 and Steam VR 100% is most likely the reason why your Pimax 8K+ is not as clear as Index. You might try at least Pitool 1.0 and Steam VR 100%.

3 Likes

@neal_white_iii has Pimax 8K not plus. Note his headset is 80 Hz

2 Likes

5k+ has a smaller panel than the 8k and why it had more utilization as it fits the physical viewport. We already know no new optics.

The 8K× sounds like a great headset.

If Pimax had these light weight, small, pressure sensitive hand controllers NOW instead of Sword/Sword Sense gauntlets or needing Valve Index controllers, they’d destroy the competition.

The etee controller - full five finger tracking - gesture, touch and pressure sensing capabilities via Jacub Kamecki #Ces2020
#VirtualReality #Vr #Technology #EmergingTech #Future #Futuristic #Blockchain: @sanemavcil @sanemrocks

pic.twitter.com/xZSOEK6JlA

— Sanem Avcil 🚀 ICO Advisor (@Sanemavcil) January 6, 2020

I have never tried an Index, so I can’t make that comparison.

I did try PiTool 1.0 and SteamVR 100%. It did not look as good on my 8K. There was significant color fringing (due to the subpixel “rainbow” pattern). Of course, the low framerate was unplayable. Previously, I was using PiTool 1.0 and SteamVR 80%, but the small text was fuzzy. The text at 0.75 and 100% was noticeably crisper and much more readable.

1 Like

if fov and ipd are literally the only thing you care about.

2 Likes

i dont know about that. 5k+ is still wider.

2 Likes

I agree. Though if Artisan is 140 Wide than it’s equivalent to Normal FoV on the 5k+. But 5k+ should have Wider Res in Normal FoV though.

1 Like

They should keep posting in diagonal FOV. Valve Index also posts 130°, which is also their diagonal.

Has anyone noticed that?

1 Like

Imho all should ditch vague Diagonal FoV and post simple Vertical & Horizontal FoV numbers.

6 Likes

Hmm, no spatial tracking yet, apparently, (other than with bolting on a pair of Vive pucks) but two enthusiastic thumbs up here, for not forcing the user into a pistol trigger grip and big annoying bulb with thumbsticks and such junk, that gets in the way. :slight_smile:

1 Like

True, but there’ll always be the players not playing by the rules… basic game theory again

4 Likes

They should post horizontal and vertical as @Heliosurge already wrote. Diagonal is just confusing, because without knowing the aspect ratio, it is basically useless. Plus, Pimax is not able to correctly calculate the diagonal FOV, what they post is mathematically impossible.

6 Likes

Yes, because diagonal tells you nothing about the aspect ratio.

a 27" 4:3 monitor is completely different than a 27" 32:9 monitor

3 Likes

Everytime I do this steam keeps deleting it. I must be doing something wrong.

Edit- seems editing the default file keeps it.

1 Like