Drift and ghosting problem with Pimax 4k and SteamVR

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1

I have a problem with yaw drift and ghosting in all games.

We are several people who have this HDM and we all have these problems.

There is an option to calibrate the magnetometer or gyros? Are Pimax engineers researching these problems?

Does anyone know anything about the RoomScale? Is it possible make Pimax compatible with Freetrack for have positioning?

Is the 90 FPS async mode activated? How active?

Does the low persistence? It may be the root to solve the problem of ghosting.

I love Pimax 4k, I played Raw Data with 2 PS3 Eye Camera and 2 Moves, but the ghosting and drift ruin the experience.

Thanks

2

No positional tracking is supported with PiMax. Not even leaning forward.

There’s a OpenSourceVR project that’s made a software to use two PS Move wands as SteamVR wands. I beleive some people have succeded in using the same software to make roomscale tracking by strapping a third PS Move wand to the HMD. Be aware that the PS Move wand emits BlueTooth radio signal and it is not yet know if using BT devices next to your head will increase your chances of getting brain cancer tumors or not. I’m looking into putting EMF shielding on the side of the move controller that’s going to be facing my head before using it.

There’s also this project https://vrtracker.xyz/ but they’re a bunch of crooks as far as I’m concerned. They’re asking for 250$-500$ for the so called dev kits. At that price I could just buy a Vive for a couple of hundred dollars more.

3

Adjust IPD maybe solveyour problem

4

Every VR products have ghosting and drift problem. You can regard it as a defect fo technology.

5

Another potenial cause of drift ghosting maybe created in steamvr as it tries to compensate less powerful hardware.

A good cross test is to download a demo from Piplay store that is similar type game to see if present outside of steam.

6

Wind is completely correct.

I did a search on Gyro drift in SteamVR. Both Oculus & vive have the drift issue but use positional tracking to compensate the gyro drift.

Both still use Gyros combined with positional tracking to reduce latancies.

Some folks are experiencing issue in OSVR as well.

I am not sure as i haven’t experience “yaw” drifting but using something like trackir might add method to compensate this in the same way that oculus/vive does.

7

how come every VR product has ghosting. that does not make any sense.
I you have a display that is splitted in half and you produce side by side 3d image into the panel the only reason there could be ghosting is the fact the panel is too slow or somehow do not draw continouse image.

8

Ghosting is also present in reg 3d

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its not true, ghosting is only Pimax issue, you never see Htc vive or oculus rift?

10

In my opinion ghosting in Pimax is caused by latency in sensing head motion and adjusting the centre of the viewport to compensate.

If you keep you head still in Unity Chan, there is no ghosting visible, but as soon as your head moves, some ghosting appears.

If the image viewport is only adjusted during the blanking period, then there should be no ghosting visible. Just like the image on your television which is only updated during the blanking period.

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11

i don´t know what i have thought when i wrote that.
no there is no ghosting in rift or vive.

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ghosting is not present in reg 3d if you mean regular.
it depends on the system.

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By regular 3d. I mean 3d tv monitors & such. But is often slight enough due to action & such to not be noticed.

You are right that even vive & rift have ghosting but so minimal only folks with very high visual aquity might notice.

14

dual projector setup does not ghosting if the projectors are fast and don´t trail on 2D.
Crosstalk is another matter. with high gain screen polarizers are good but have some, really little in best case scenario.
but one can also use white light multi band filtters, there is like 0 ghosting with black on white. or reverse.
though it is recommended to have xenon light source and some color correction. i have both but im currently using
polarizers.

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