I’m somewhat familiar with refresh rates and all of that stuff however could someone explain a few things in layman’s terms for those of us who aren’t that technical.
75hz vs 90hz, what does this mean when actually using the Pimax 8k?
Given a 1080 card and powerful PC, would running at 75hz cause skipped frames or other issues?
Would that be only in high action games or if turning your head very rapidly several times?
Supersampling, what does this do? Why is it needed?
Can all these issues be resolved by the end user simply by lowering the settings?
Sort of like how you can run many demanding games with good FPS just by lowering some settings, you end up with a game that isn’t as pretty but it runs just fine.
Thanks and feel free to explain the other issues that are being questioned right now, I feel like many people out there are not understanding what the issues are. (I’m only getting 60-75% of it)
Are these really issues that the masses will care about or are we talking about little things that most people wont notice?
Supersampling is when you render an image larger first and then scale it down to show it on the screen. This method gives a smoother image with less jagged edges but costs in performance. There are some different methods of supersampling which I cant go onto in detail, but roughly when it says 2x it renders double the image.
(Shoutout to the voodoo5 i have in my closet, still rocking that fullscreenantialiasing, a pioneer never to be forgotten)
regarding the refreshrates i too would love some colorful explanation. The thing i know from own experience is you can sort of feel difference between 60hz (my old computermonitor CRT) and a 75hz meaning there is less strain on the eyes at a higher refreshrate even though the human eye only has a refreshrate of ca 24 images per second
Just to add some precision to what @Jakob wrote. Supersampling (SS) is a known method to do anti-aliasing = to smooth out jaggies which normally appear when computer renders a line on a display.
There is however the second and more important role of SS in 3D VR. It is used to compensate for transformation artifacts which would normally come up from pre-lens warp transformation. This type of supersampling happens on Vive and Oculus behind the scene and seems to be set to factor 1,7.
In this case it is not “just” rendering into larger buffer and then scaling back to the output resolution, but during the scaling, also, the pre-lens warp transformation is applied, which generates the famous “pincushion” “barreled” images. Supersampling here is needed to not lose image information in the transformation.
BTW supersampling factor factors the number of pixels, so 1,7 would mean 1,7x more pixels in the supersampled image. So if you double the image dimensions (i.e. from 1000x1000 to 2000x2000) you get supersampling factor 4 (=2x2).
Yes. But for Pimax8K it seems to be actually much worse than 1,7. In the recently released video about the tests they did on refresh rate there were using render buffer 40962657 for the output resolution of 25601440 (res/eye). This gives SS factor almost 3.
Ye they had some way of tilting the rendered images and adding them together, it totally got rid of all jaggies and other aliasing-artifacts. Too bad the company died like the same week i got mine ;(
3dfx foreevvaa!
(Damn you nVidia!)
