For this experiment I’ve used a picture posted by @risa2000
I’ve added to semi transparent squares, one blue and one red, they are right in the middle of the picture. An a vertical green line, right in the middle too.
First replace it as “pimax_default.jpg” in C:\Program Files\Pimax\Runtime\resource and restart service
For the experiment, (I have 64 IPD) I start looking at one point in my room at about 2m distance, and with software IPD at 0, I put the headset on, and I see 4 colored squares instead of two, and two green lines instead of two. Very bad.
I repeat the process, take off the headset I set the software IPD at -1,5, look at 2meters distance, and I put the headset on again, now I see three colored squares.
I repeat the process with software IPD at -3, when I put the headset on I see two colored squares, and one green line, but still not perfect.
Finally, with software IPD at -3.5 the picture is perfect, two squares, one green line and the numbers are perfectly aligned, and theoretically my eyes are aligned as if they were in the real world so it shouldn’t give me eyestrain, right?. (I’ve never tried such a lower software IPD, and I always set the physical IPD a bit lower than mine) I start a game and yes, everything look right.
What concerns me though, is that the green line should be right in the center of the picture, but it’s not. It’s displaced two squares to the left, I mean, if I close the right eye I can count 13 squares from the green line to the center of the lens, and if I close the left eye I can count only 11 squares. I can clearly see the line displaced to the left. So the whole world is not well aligned.
I thought it was my eyes that were not symmetrical in my face, but my wife have tried it and it’s the same for her.
I’ve tried it in virtual desktop attaching the screen to the hmd with the picture in full screen, and its the same there, so it’s not a problem of Pitool default picture. The view of both screens are not well aligned.
So, maybe my unit is bad calibrated, maybe it’s our eyes or maybe all the screens are bad calibrated. Is it possible that it’s causing eyestrain? Maybe some of you can try it and give some feedback.
Would be nice if in new Pitool was implemented a screen horizontal offset value per eye, then with a simple test like this we could get the world perfectly aligned, and without eyestrain. Hopefully
EDIT; This test is useful to check if your screens are well aligned, the green line must be right in the middle of your view.
You can check it by closing one eye, and counting the number of squares from the line to the center of the lens, both eyes must see the same number of squares.
If it is, better use a 3d object to calibrate the IPD