Pimax 4K strange IPD center blur


#28

Hi there, I just received a 4K delivered from Amazon and it too has the same central focus issue as outlined in this thread. It does seem that if I pull the headset further away from my face it can improve slightly. Rather than modding this, is there an official line from Pimax regarding this problem. Has it been corrected at manufacturing for newer versions?


#29

A simple fix might be to purchase thicker face foam. @jonnypanic i beleive purchased after market face foam for Vive.

All the current 4k models are built with the myopia to 20/20.

Now the foam is attached by velcro. You could remove the face foam & create a gasket spacer with velcro (peel & stick or sewn) & rubber peel & stick rubber weather seal.


#30

Hi I got some spare foam from VRCovers so I’ll try that. So to go into more detail. Playing skyrim for example, distant objects are totally out of focus unless I look through the top portion of the lens. Meaning I have to place the HMD further down my nose for it to start looking correct (even then it’s not perfect). If I avert my gaze away from this focused spot then I lose the clarity.

I am also seeing major ghosting when turning head. TBH Pimax sent this item for me to review but in its current form this would not be favourable. I’d rather not have to use user mods either as this isn’t going to be fair for a review.

I love the clarity and colour of the image which beats the recent GO and Rift for sure so if I can get the focus issue sorted then this does give me great hope for the 8K which I’ve backed. I am wondering how you guys are getting on with these issues?


#31

Ghosting is unfornately an issue with this headset.

@Pimax-Support mentioned some kind of solution but not clear if its a fix for current model or not.

Piplay v3 increases ghosting. Atm best versiin is the previous 2.0.7? (Just before the v3 release)

Are you farsighted by chance?

What is your system specs?

I am surprised (@xunshu ) they would send you one to review without the potenial ghosting fixed in place. Sim games work well as you don’t need to do fast head rotations. Vanishing of Ethan Carter with vr dlc pretty good as well.

One user did report trying reading glasses of +1.5 & said it made picture clearer for him. If you hsve a discount store can be pretty cheap to try.


#32

I think I am the reverse. Nearsighted where distant objects are less focused. Last year I had my eyes tested and had 20/20 vision. since then it has become harder to focus on distant objects. So that’s definitely a symptom of nearsightedness. Is there a way to revert back to the earlier versions? I tried to download the 2.0.7 using the forum link but it failed on Mega. Any other source for this?

Using a GTX 1080Ti, i7 4790K CPU, Windows 10 64 bit etc.


#33

I only found this link. 2.0.5 might be okay as well. Have you checked their main site to see if it has more than one version to download?

With your gpu @Enopho can help with settings as je has a 1080ti as well. I know he has reported the lastest nvidia driver is not best for performance & quality.

With current ghosting it works best for video compared to headset options now available. If they have a solution for this 4k model’s hardware they should release it before having a review performed.

@xunshu @henry.lu @Pimax-Support @Sean.Huang


#34

Thanks Helio. I’ve disconnected it for now because I feel I am doing harm to my eyes. This experience has been really weird for a VR vet like myself (Gear VR, PSVR, DK 2, Vive, Rift, Go and now the Pimax 4K under the belt many 100s of hours in VR). I tried Skyrim again but could not get the focus correct. It feels like the top part of the lens should be in the center. No amount of shifting the HMD to my face corrected this issue. So I had to tilt my head downwards and then look up for the image to be in focus. Obviously this is not practical at all.

I am wondering if this is actually a manufacturing issue with this particular headset batch? Is there a way to check its age with the serial number perhaps? Maybe this is simply a defective unit.

If there is some other issue that can be corrected through GPU drivers then I am certainly willing to tinker a little. Hopefully someone can relate to what I have described.

I feel like I am in exactly the same boat as the op Lillo here. Serial number in case this helps - 10071174102708.

I can’t reiterate enough though. Skyrim VR looks fantastic when in focus, so much better than the Rift…incredible. If the Pimax 8K is better than this then wow we are in for a treat.


#35

It is possible that their maybe an issue with the unit you received. I believe usually myopia users have better experience. Checking the box under specs does your myopia fall within the value?

Wearing your glasses or a perhaps readers of -1 to -1.5 might work to improve image focus.

The 5k/8k uses the same focus method of the vive & oculus. The v2 in spite of the known issues of the prototype was still a sweet treat to whats available.

With the pokes in tge above post if a team is around might have a response in 7 to 10hrs. It should be about 1:50am there.


#36

I don’t wear glasses.

“Checking the box under specs does your myopia fall within the value?”

I don’t understand this question?

Yeh hopefully someone from Pimax can chime in here - although the way you go on these forums Heliosurge, maybe they should offer you a job.


#37

In the above it says supports myopia upto 300 degrees.

Not familar but would that be up to -3.00?

Ipd value is often off from actual ipd.


#38

I think there is not much to do with the problem, the Pimax 4K has been engineered with myopic people in mind, like most chinese people are, Pho3nix seems to have had partial success by increasing the lens to panel distance by adding some spacers, not an easy mod for everyone though…


#39

Sorry I don’t know these details. I need to get my eyes tested again as it has been two years since the last test (I think I said last year in my earlier post which is incorrect).


#40

having focus on the top of the lens and not in the center … has been mentioned before, problem was IPD values, trouble is if you move the IPD to make the center of the lens clear you may end up feeling cross eyed and you will have to lower the IPD value which can cause you to be looking towards the tip of your nose.

i find that if you have a high IPD value (above 63) and do not have 20/20 vision, this is an issue for me as well…

I will share piplay drivers and nvidia drivers as @Heliosurge mentioned the latest Nvidia drivers cause micro stutters and the latest 3.x piplay drivers have increased ghosting (admittedly the 3.x drivers are still Beta drivers so i cant complain)

My PC spec is pretty much identical to yours, Aourous GTX1080ti, I7 4790, win10 Enterprise 64bit. 24GB DDR3 memory.
my Nvidia and piplay drivers:

Nvidia drivers : 384.94-desktop-win10-64bit-international-whql
Piplay Drivers: 2.0.7.54

regards

Eno


#41

Thanks to @Heliosurge @Enopho and @Lillo for helping out!
@RobCram Pimax 4K would be a great option for the flight simulators, the racing simulators, the first-person shooters, videos, and the virtual desktop.
please feel free to let @henry.lu know (email: henry.lu@pimaxvr.com) for any question/thought about the 4K review.


#42

Were these supposed to be linked? Either way, I had no issue with my current driver in terms of performance. But the ghosting was really bad using the latest Piplay beta drivers. Skyrim VR played smoothly, as did Fallout 4 VR (although this was a little dark). I really do not want to screw up my eyesight and as someone else mentioned in another topic the after effects can make your vision a little strange until the eyes correct themselves. I am going to try and get some 1.5 reading glasses as suggested.

For further info my IPD on the Rift is 63-64.


#43

Hi Xunshu,

@Pimax-Support had mentioned that a solution was going to be updated on Ghosting. Support was vague on details but said the team had a solution to eliminate ghosting. @pho3nix had mentioned atw might work as well as ghosting is only during head rotation.


#44

Rob try your ipd with -5 or +5 as the ipd is off. I think @sjefdeklerk has a similar ipd as yourself.

5k/8k will be better as it has mechanical & soft ipd adjustment. The lens to screen focus is better as well.


#45

No, this totally messed up the view causing an unnatural 3D effect. What has improved things is wearing the reading glasses 1.5 as suggested. However, this creates an unusual image warping (fishbowl) effect when turning head (could be the glasses in part) and adds its own problems with comfort. At least this is a big improvement.


#46

Really sounds like my situation. I have no such issues with my Rift, but with Pimax …, until lately.

I have seen in some discussion that some users have started modding device by moving lenses away from the panel - sounds risky. But to me that confirms that lens focal point by default is in wrong place. And there is two ways to fix this. Moving lens and loosing FOV or moving focalpoint by adding additional lenses.

Now I have these: https://www.planet-estelle.com/product/17466851

That solved the issue and will stay in my Pimax 4K for good!


#47

Finally an intelligent solution ! Damn…wish I had found this before sending back my 4K, anyway…I am now convinced that the headset is still plagued from un-optimized software and bugs in Piplay (ghosting, poor SteamVR compatibility, other bugs) and the absence of motion controllers are a too much important missing feature for today; I really doubt Pimax will make any serious effort to fix these, now that they are 100% committed to the new headsets.

I’m way more happy with my Lenovo Explorer now.