Sorry if i missed this but what is the ppi on the 8k and 5k version of the headsets?
ppi is not a relevant factor for VR. Youāll want to know the PPD (pixels per degree).
That would be per eye: 4k per 100 degrees, so 38 PPD. The Vive has 11 PPD and Oculus DK1 has 7.
2 Likes
Well, since this 8K is 8 times the res of Viveā¦does that mean itās 88 PPD but that donāt make sense because human eyes fovea is 60 PPD.
I really hope the tested guys try it out in their lab and work the shit out of it. I want to see it running at full potential
No. Itās per eye. 4k for the Pimax 8k, 1k for the Vive, so 4x more. But actually the PPD should be less than 4x more because itās a wider FoV
Concerning this point it would very useful to get a comparison with Oculus CV1 and Vive used at max setting (i.e. pixel override = 2). I owned a Pimax 4K, I bought it on March, it was with Piplay 1.2.53, in the beginning I was astonished by the lack of SDE, but then I realized how poor was the quality of the image, compared to Oculus Rift CV1 that I own as well. What I mean is not only referring to worse colors and washed out picture, but the 3D effect was not real too, I was so disappointed that I returned the headset. I know that since then Pimax has made good progress with Piplay software, it seems now in pair with Oculus but I am not sure since I can not check with my eyes!!! Resolution is not all, the way the image is actually seen in 3D is very important too, I do not want to return another headset!!!
@Sjef said should be about 38ppd for 4k @ 100Ā° fov so 22 shy of 60.
Itās unfortunate you only tried the 1.2.53. This version the Pimax team was still heavily developing their own rendering engine.
1.1.92 was using steamās rendering at the time and produced a nicer fidelity.
Once 1.2.x reached 85+ the render became on par with steamās quality. Now actually looks better in 93+
The main thing on the render of the 4k model is to get ghosting reduced.
Now the 5k & 8k are considerable change/improvement vs the first gen 4kā¦ I would wager to say what oculus cv1 is to dk1.
1 Like
Quote from here:
weird inconsistent warping or geometric distortion when getting farther away from the center of the lenses, an inaccurate distortion profile in general, a low binocular overlap
ā¦
The low binocular overlap seemed to be the biggest immersion killer alongside the warping/distortion
I think this is the most important things that we need to know. This is what we need to ask persistently.
They (Pimax guys on this forums) told about brightness and ghosting are nice or at least good, and I believe them. Other things I think at least are OK too. But I didnāt see they answered about overlap/distorting. Seems they ignore this questions.
It makes me very afraid that this things didnāt change seriously from January despite this is the new prototype. I will be honest Iām not a specialist. But I read threads on reddit and some guys tolds that this things (overlap/distortion) are very hard to fix. That FOV is very big to make it properly and qualitatively.
I think we need Norman to pay very close attention to this. He is skilled and independent guy. If he will conclude that this things are not exists anymore or were seriously changed to the good, then Iāll kickstart without doubts. If he will not, then I donāt know what to do. We can find ourselves at situation when we receive near useless hmd with killed immersion.
If you think Iām right then mention your support in thread, to make sure this questions will reach Normanās attention. Or if you think Iām wrong then of course post too. Iām not specialist so maybe Iām exaggerating and this issues (even if exists) not so significant to overall quality and usability of hmd. But from what I read, I have a big doubts.
1 Like
The people who tried it at IFA seemed to be very positive, so I have hope Pimax did change this for the better. Iām sure Norman will take a good look at this too.
3 Likes
Yeah, be careful with reddit at the moment, as they are referencing the older prototype, and the latest review said binocular overlap was good, no distortion, and everything was super clear. He said display was not quite as bright as oled but it was only slightly dimmer to where the oled only seemed brighter due to the vibrancy of color being better in general on oled. I remain cautiously optimistic about pimax 8k as Iāve used my vive every day for a year and a half Iām tired of the low fov and res.
2 Likes
Thanks for reminding us, indeed lots of rumors here: https://www.reddit.com/search?q=pimax+8k&restrict_sr=&sort=relevance&t=all
Iād like to know what hardware is required to run the 5K and 8K VR systems?
Things like the recommended and minimum specs for: GPU, CPU, Memory, number of USB ports.
2 Likes
I would like to know if they use a type of space warp and timewarp.
1 Like
hey, i brought norman to this thread. please follow up on reddit
3 Likes
Please also mention if you are using the āblue light filterā for the review and if it will be mounted on the final Pimax 8K version. Do the new entry level Microsoft LCD HMD use this filter? It seems Windows 10 is caring about āblue light problemā too so this point is a bit scary since the headset is expected to be used for long sessionā¦
Thereās no āblue light filterā, other than the cool colour settings. Sure, the shutter glass (which youāre referring too) works like a sunglass too, thatās why the colours and brightness are so dim in the Pimax 4k. But Iām sure it doesnāt particulary filter blue light.
Anyway does the Pimax 8k have such a shutter glass too ? @deletedpimaxrep1
1 Like
We have improved the solution for de-fogging and eye protection system. the brightness is improved.
1 Like
Iām reminded of when a friend and I implemented a scanning LED sign. We had hardwired logic (a Johnson counter) powering only one scanline at a time, and used one of those lines to shut the display off if it were to stop scanning. Iām guessing thatās the sort of eye protection the backlight strobe would need in the new Pimax headset.
Norman has a lot of respect from the community, thatās for sure. Pimax must be either very confident or very naive, Iām leaning towards the first 
So theyāre reviewing it as we speak, hoping weāll see the review tomorrow, I for one canāt wait to hear what Norman has to say !
1 Like