There’s been numerous of posts regarding the geometry distortion issue (I guess?) where some ppl see the VR world moving a bit while panning your view from side to side. This has been noticeable by looking at the SteamVR dashboard and looking left-right-left and so on. MRTV Sebastian @mixedrealityTV was one of the first ones mentioning this.
Now personally I have never seen this issue until yesterday, despite really looking for it. What made me to finally see the distortion was the fact I tried to use the original Vive 18mm face pad and on top of that, the 6mm VR cover face pad with pimax 5K+.
I did this just for science to see how much FOV you lose by increasing the distance between the lenses and your eyes.
What I immediately noticed though, was this strange effect of things/objects/walls moving when I moved my head. A very weird and distracting feeling. And yes, it was very noticeable in the SteamVR Dashboard.
Switching back to only Vive 18mm face pad removed the problem completely. Same when moving back to original Pimax face pad.
Now this got me thinking. I know all people have different face shapes and the depth of your eyeball position can differ a lot.
If you have a problem with the “moving world” issue, could you please test using a thinner face pad than the original Pimax, to see if it solves the problem for you? Or maybe the other way as well, try a thicker face pad?
I think the distance between your eyes and the lenses is crucial, and needs to be correct to really get the proper view. Note that in both cases, the image was 100% sharp, so the distance does not increase/decrease optical quality.
Suggestion to Pimax team:
I think the Pimax team should elaborate with the removable plastic part (between the headset and face pads) and maybe make 3 different models, one original, one a few millimeters thinner giving a smaller distance between lenses and eyes (to solve this issue), and a third model with bigger distance, made for people with glasses. The plastic part is easy to remove and put pack, and I think making variations of this part could be a more sustainable way instead of creating lots of different face pads.
Let me know what you think!