Not sure if this was already posted but heres another review, Lets Discuss

with regards to the leap motion. I didnt realize it just dangles there held by the usb thats a little disappointing. I imagined it cliping on snug.

I also feel like somehow they completely managed not to talk about the FOV. no mentions of distortion so thats good.

These guys seem say the sweet spot is tinier than the vive which is complete opposite of what everyone has been saying. (Its Huge)


Man there were a lot of issues with this video. I don’t even know where to start. They updated from .91 to .95 and magically perspectival distortions went away? These guys sound like they have no clue what they are doing. It’s infuriating that so many reviewers these days use this “It just works” mantra to override using your fucking brain. If you bought a VR headset, chances are you have a little more acumen beyond ‘power on, put on face, all the games are perfect’. For fucks sake. I hear Linus doing this more and more as well. People hear this shit, get cold feet and then they miss out on all the fun.


Guess he didn’t use the screws or were missing.

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they have a point with the cheap plastic. Alot of people have been RMA’ing because the plastic breaks.


At 21:10 they talk about games that didn’t even work like pavlov fallout project cars…they don’t even know about parallel projections oh god :sob::sob::sob::sob::sob::sob: pimax really need to make this clear for people like this who don’t even bother going into the settings ffs…


That seems to be because they are using the term the correct way; Designating that you are wearing the HMD correctly, so that the pupils of your eyes are in the focal point (or “sweet spot”) of the lenses, whereas all too many incorrectly use it to label their impression of how large a portion of their FOV is in focus - an area, rather than a spot :P. The latter is to a great degree a function of the former, which would be why the misconception has come to be. :7

As for the plastic… I’m a bit ambivalent there… The relatively low weight of the device can be directly attributed to the shell being that thin and flimsy – Sturdier HMD? -Oh yes please! …but it’s not going to result in a weight increase, right? :7


So…a tiny sweet spot is still a bad thing right?

the way most vr people interpret “sweet spot” is the amount of leeway you have to get a focused image. Most have said that you have to fuss less with the pimax once its on your face to get a clear image.

As for the plastic, I agree, most say that they are shocked that the pimax is as light as or lighter than the rift, and much lighter than vive. I own all headsets and recently picked up a used vive (in preparation for pimax) and vive is the first headset ive worn that actually gives my neck a work out, its crazy how heavy the vive is. So yes its a trade-off for sure

Well, yes… and no…

Apparently one of the main reasons we got the (rightly so) much maligned fresnel lenses in generation 1 HMDs, is that with the thinner lenses, you get a little bit less distortion from not being exactly in the sweet spot (an effect often referred to as “pupil swim”), which is good, because that means you can look around with your eyes, without the world warping around you too much (sidenote: you may instead notice that the whole world “shifts” or “jumps” in a sudden discrete step, at some point, when swivelling your eyeballs, as they cross a lens segment border).

However: It appears we can also allow this to fool us to a degree, as has often been demonstrated in the Oculus subreddit, and recently here as well, where people take an apparent clear view (…or “large sweet spot”, as they’ll say) to mean that they are good, making them settle for where they are at, even though they still suffer from other effects of being off – noteably, around here, the extra (…on top of the usual) distortion in the periphery, when the 8k/5k is worn too low on the face.

EDIT: Generally I’ll be happy when there is no such thing as a sweet spot, and everything looks right no matter where our eyes are. :slight_smile:

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yeah, we only know this because we’ve been glued to sweviver videos. But pimax should be automating this in software.

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i think we need foveated rendering for that.

What most reviewers seem to miss with the pimax is that its modular and we are getting eye tracking down the line as well as leap motion wireless etc

what you see now is really not what you get in the future.

(EDIT) this is definitely due to bad marketing.


Damn youtube noobs cant even tune it right, I mean how stupid can some people be.
Amazing how they can even boot the PC


Depends. Eye tracking would allow for adapting lens distortion for looking off-axis, but the lens is still what it is, and we can still not stray too far.

There is also a question of just how good (accuracy,precision,speed) the 8k/5k eyetracking module will be; Enough for foveated rendering/distortion, or not? For one thing: If nothing has changed since the kickstarter, only one eye will be tracked (confirmed at the time), which means we can have no convergence (EDIT2: …nor IPD) information, and have to infer the likely-ish position of the other eye by e.g. raycasting to the nearest in-game object (EDIT3: …whilst assuming the user’s face is perfectly symmetrical).

A “true” lightfield display should give quite a bit of leeway, but who knows if we’ll ever get to displays that are dense enough to do that near-eye, at decent resolutions… :7

(EDIT: Another effect that one could try with eyetracking, but which a lightfield display wouldn’t need since it would do it “properly”, is that one could add artificial depth-of-field blur, based on vergence and z-buffer, but I must say I am somewhat dubious about that, even though the makers of the Fove HMD claim they had good results.)

(Avegant has a lightfield HMD prototype, but I believe that’s rather low res, like NVidia’s research experiments. As for Magic Leap, their device is a multifocal display (two planes), and I must opine that they are stretching definitions waaaaay beyond the breaking point, in hawking it under the “lightfield” monicker.) :7

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That is your average user, and it is certainly your average user with the tool as it stands today.

Given we don’t really know the full extent of what changes in PiTool with the supersampling settings and Pimax won’t tell us we are in a bit of a position where understanding the full range of what PiTool does is actually impossible. The fact is this stuff is complicated and users are going to get it wrong and the existing tooling isn’t helping explain the situation much or choose reasonable defaults for common games.

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btw. I prefer not to be in the absolute perfect sweetspot with my 5K+… less SDE, still very sharp image.