Mr Teatime's 8K+ First Impressions

Hi all,

Got my 8K+ a few days ago, but not had a great deal of time to play with it other than initial setup and a quick trip into Elite Dangerous, so this is without any tweaking and “straight out of the box”. Also my wife will be using this one, as I’m still happy with my 8K and we both exclusively play Elite Dangerous (normally in a wing, but sometimes multi-crew).

Packaging - looks more professional with its magnetic clasps
Headset build/quality - feels heavier than my 8K, but not weighed to be sure. It also feels more robust and I like the “rubberised coating”
Comfort Strap - so I know we’ll be getting the rigid mount at some point, so this won’t be the “normal” customer experience, but the cloth strap is worse than the 8K’s. The top strap is too short to allow the triple joint at the back to sit low enough on the back of your skull, so the HMD tends to droop forward.
Comfort - HMD/Facial Interface - very much improved over the 8K - if you can get the cloth strap holding it right then the new face foam is like wearing a full face crash helmet where it touches. The nose flaps I think I will remove - they’re OK, but are a little intrusive. Oh and glasses fit inside really well (my wife needs them, but I fly without).
Software - I acted like a new customer here, as the 8K+ is going on my Threadripper machine, so installed Steam, then SteamVR then the PiTool off of the web site - v xxx.249 iirc. That was OK and as its using the same lighthouses as the 8K , the setup picked them up and everything came to life much more easily than the 8K experience.
I left settings completely alone apart from disabling Smart Smoothing and enabling Parallel Projections and hopped into Elite Dangerous, which just picked it up instead of the Rift that was on this machine. So that was cool.
Screens/Lenses - improved imho - better colours/blacks (not huge), couldn’t make out any SDE very easily, no ghost rays and the clarity seemed much better. However, with this software version I am seeing a kind of swimming/distortion effect at the edges of each side and it appears I think outside the zone of binocular overlap. Best I can describe it as is like looking like a kind of rippling water effect and it doesn’t always occur, which makes me think its a distortion profile thing in software i.e. fixable.
Tweaking - I will try and tweak the experience by installing different software versions to see if the distortion goes away and also see if I can improve an already improved view compared to my 8K.

Conclusion - unless the distortion is related to my install and is not software, this needs fixing asap before new purchaser’s wonder why the experience isn’t as good as other PiMax 8/5K users have described it in the past (i.e. its currently retrograde). The rigid headstrap can’t come fast enough. I can understand the need to get the products shipped, but this cloth headstrap is worse than the previous 8K version and the general market won’t be as forgiving. Unless the rigid headstrap is more than 2-3 months away, a delay even though its unpopular is probably better than giving some of the “anti-PiMax” crowd further ammunition.

TL:DR - once the rigid headstrap is shipping with the unit and the distortion is patched out I would recommend this product to others. Until then I couldn’t recommend to anyone who isn’t willing to wait for those two improvements (or work around them).

P.S: My wife is very happy however coming from the Rift, with the FoV, clarity and other improvements from the Rift and is now looking at me to improve the strap and tweak the software.

PPS. I’m not going to post this in the Elite Dangerous forums yet, until I’ve had a go at getting rid of the distortions.

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Thank you for your impressions.
What FOV are you using?

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So not too long ago everybody was saying the 8k+ had better distortion than the 8k/5k+. And now everybody is saying it’s worse? Did pimax upload a bad distortion profile in the new version?

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I tried Large to start with then Normal - in fact the initial Large setting plus PP etc. I made didn’t save even though the dialogue reckoned it had - so that’s another smaller niggle that needs sorting out on the software side.

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Yes, I too am wondering if it has anything to do with the Pitool used at the roadshows vs. the Pitools publicly available.

If that is the case (Pitool can affect distortion), will the new distortion profile help older models?

@SweViver @PimaxUSA Is this a likely case?

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I’m assuming that’s what it is - I’m using 129 on my 8K and that’s almost perfect to me in Large FoV, so I think that will be my next port of call provided it will run the 8K+

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You should use new PiTool, 253 or 254. It might be the reason.

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Was 254 the one you were using at the Roadshows or it was another one with a different distortion profile?

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Thanks Martin - are those versions released or beta?

If the latter where can I get these?

This link should work https://community.openmr.ai/t/alpha-pitool-1-0-1-254a-jan-21-2020/25366

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Thanks

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Thank you for your impressions of the 8k plus.

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I would advise against .254 at the moment as it isn’t stable for extended use and will crash. .253 seems to have studder issues as well. And so far for me at least no current available pitool solves the distortion issue Mr Teatime is talking about. My experience was the same with the 8k+. I personally felt the SDE and clarity was better than the 8k and 5k+ but the distortion was a bit worse. Hopefully they can focus more on the software side of things once the 8kx is finalized. Seems to be the biggest current issue for most Pimax users

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I have no problems with 254, on both the Pimax Vision 8kX and Pimax 5k+.

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For me it runs pretty well but it will randomly crash during extended sessions. There have been several posts from other users that have had the same experience.

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Agreed, .254 is a great experience with no stutters for me, for approximately an hour until it crashes the game. When this is resolved .254 onwards should be good.

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Do not forget to make this…

try bumping up the max recommended resolution value in SteamVR config to 16384.
Just add, inside the steamvr brackets:
“MaxRecommendedResolution” : 16384
And restart SteamVR.

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+1
Makes a huge difference for me with 8KX, and a noticeable difference using 8K+ although, is not as big.

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@SweViver In fact, I must admit, my steamvr settings default file had that maxRecommendedResolution value all along. I must have put it there something like a year ago, determined never to have to put up with it, then forgotten about it. Consequently, I will be updating the README for my extendedInterface project…

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Quick update:

Loaded PiTool xxx.254 and the distortions are gone. I ran a few scenarios in Elite Dangerous just to try things out, but no long term test, so I can’t confirm any crashing over time yet. Myself and Mrs Teatime will be heading out into the black for a long session tomorrow night, so hopefully it holds out, or WAF will drop significantly :sweat:

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