Finally I received PIMAX VISION 8KX today [Review]

With my 5k+, the only chromatic aberration I get is at the edges of SteamVR overlays.

1 Like

Interesting. It doesn’t bother me much, but I’m pretty certain that white text has fringing in every app for me. gets worse the farther from the sweet spot you go I think. Long weekend and I’m dying to try automobilista 2, so I’ll have to try it out again… might be exaggerating

Ask your wife to review the headset while you are at work.

7 Likes

Smearing outside the lens sweet spot is normal. For this to be significantly different per color is not, and especially not within the ‘potato FOV’ 90deg area.

2 Likes

Smearing for sure, and I know that lens glare can cause fringing. Like i said, it’s not bad at all but I’ve noticed it since day 1. It is definitely worst in overlays. Almost expected it with an FOV this big. TBH, I’ve never even tried potato FOV… get enough of that with my quest haha. But I doubt it would be present there, as that’s like 100% sweet spot.

1 Like

I second that!

Also dont forget to increase the MaxRecommendedResolution to 8192 or higher in Steamvr.vrconfig

15 Likes

@SweViver @mirage335

Now that people are finally getting headsets it might be wise to sticky a guide on how to get the best 8KX performance/picture quality.

16 Likes

A quick question please Martin about the ‘MaxRecommended Resolution’ hack…

Will the in development Pimax VR Experience be able to change settings like this in the future, by automatically detecting the headset model and adjusting optimal resolution settings in the background?

Thanks.

2 Likes

I think at least in his pimax Experience @SweViver showed an auto set option - there is nothing bad setting it to 16384, since it’s only a top limit.

2 Likes

@SweViver I will write this. Should be brief.

5 Likes

Yes. We have discussed automatic headset detection, and setting this to different values for various reasons.

I thought not, but IIRC SweViver mentioned some reasons for it to be slightly lower in some cases.

2 Likes

Are you guys thinking of having the hardware automatically analyzed and then the proper settings made, or something more like Ultra/High/Med/Low settings we can select?

Let’s not go too many posts off-topic here, but as has already been stated, cloud profiles, sane defaults, etc, are along the lines of what has been planned thus far.

3 Likes

Yes, 6DOF not needed to check distortion but translation can indeed make it a bit easier to detect than rotation.

I think the most reliable way to check for distortion is to observe the deformation of a circle (= does it become oval?) when making it approaching an extremity of the FOV (left or right, but can also test up and down borders).

Also instead of turning your head you can keep your head fixed and rotate on your chair instead. I find not having your brain deal with your neck muscles helps concentrate on the circle deformation (not mandatory, as for 6DOF. Just makes the observation easier / more obvious).

You can use the “sun” in pitool environment, it is a good reference circle. If you use a specific test pattern then configuration must be set so that the pattern won’t follow head movement (of course).

I find the test pattern below gives good result. Set the zoom/distance/size so that the circles are not too big or too small (same size as on the picture is good). Then rotate (or translate) your head to make the circle(s) approach a FOV border (like right or left side). If there is distortion the circle will progressively become oval (the other circle nearby helps to have a reference). This deformation can also give the feeling the 2 circles are "getting “squeezed” against each other.

3 Likes

I tried stuff like that in Virtual Desktop. Distortion was not nearly as easily to perceive as just looking around in HL Alyx.

1 Like

It certainly helps to have other geometric references nearby the objet you observe the deformation of.
With the above pattern the deformation is less obvious when there is only a single circle.

When I first tested my 5K+ the distortion was huge (tested in pitool environment, observing the sun. That was in 3DOF). With the RMA replacement I have recently received the distortion seems to have improved indeed (could aslo be software improvement as I had stopped using the HMD for a while before the RMA).

But it is still there, so I’m curious if more improvement was made with the 8KX (distortion has always been one of the top concerns for me with the 5K+, at least for large FOV mode).

Eye-to-lens distance affects distortion, the closer to the lens the less distortion. But as eye-to-lens distance also affects godrays/glare (too close = more godrays/glare) there is a minimum distance I must keep to get the best image quality (I hate godrays so my priority is to minimize them).

3 Likes

Nice.
Brightness and Contrast could be in part to PiTool render at 0.75 and then there was the in game gamma settings.

People remember though, he is using a 1070ti to drive the headset so one can’t go to mental on the SS / Render Settings. Slide shows are not fun in Sims including VR ones. :grin:

3 Likes

I found this very annoying on all kind of headsets I have except of couple like Samsung O+, CV1, probably it’s Win10 driver related.

The fix for me was to install APO equalizer, select audio device & use preamplifier, it raises signal drastically without affecting quality (I didn’t notice at least). On Rift S I almost couldn’t use native audion with it’s stock volume on max until the fix, also Valve Index was too low for me but with amplifier it sounds decent (same for Vive Pro).

3 Likes

This trick works with my soundbar…

27 posts were split to a new topic: To Keep the Potato FOV Label or not to Keep? That is the question