10-24-2017 08:42 AM
11-21-2017 10:49 AM
kojack said:
I get some sleep, go to work, and now there's 60 posts in here to read. 😞First, that's not the reason for stretching (by which I assume you mean the distortions it used to have), it was because SteamVR was rendering low FOV then Pimax was stretching it to high FOV. You can't do that, it distorts. Upscaling FOV is very different to upscaling resolution. But we've discussed this before.
Atmos73 said:
Things changed. The original render was 2560x1440 which gave the stretching. Then Valve got onboard and fixed SteamVR to output 4096x2657. No more stretching.
But if this is true, is everybody who ordered a Pimax 8K X getting a $200 refund? The difference between the 8K and 8K X was:
- 8K can only handle 2560x1440 over the cable, which is upscaled on the headset to 4K.
- 8K X can handle 4K per eye by using 2 cables
Now you are saying that Valve have somehow magically made the cable send more data so the 8K is now equal to an 8K X. So what's the difference between them now?
(See, this is why I don't like kickstarters like this, things keep changing, you have no idea what the final product will be)
Or is SteamVR outputting 4096x2657, which is downscaled to 2560x1440, which is upscaled to 3840x2160? That seems more likely and nothing has changed in the headset, it's just more marketing.
Now as to the whole 8K issue.
There's two common definitions of 8K that could apply when doing VR rendering:
- 8192 x 8192 textures (textures are usually square, so just give one dimension)
- 7680 x 4320 (tv standard)
Using 8K as a marketing term is problematic because it doesn't meet either of those (it's half the pixel count of an 8K TV and one quarter of the pixel count of an 8K texture). But even more importantly you don't actually see 8K horizontal res because of stereo overlap. You don't have 7680 pixels spread over 200 degrees. If the per eye FOV is 150 degrees, then that means you have only 5120 horizontal res visible.
(150 degrees per eye, 200 degrees total means 50 degrees left mono, 100 degrees stereo overlap, 50 degrees right mono. This becomes 1280 pixels mono, 2560 stereo overlap, 1280 mono, which is 5120 actual visible pixels).
The correct way to refer to the Pimax 8K resolution would either be 3840x2160 per eye or 4K per eye. Not just 8K.
Anyway, I've wasted far too many words recently on this.
Complaints have come in about this thread, expect mod actions like closing or bans to follow if things don't improve in here (which of course isn't going to happen, the destiny of this thread was clear from the very beginning).
Remember, this is an Oculus support forum run by Oculus, Pimax have their own forum where you can talk about them as much as you want.
11-21-2017 11:12 AM
11-21-2017 11:38 AM
11-21-2017 11:44 AM
11-21-2017 12:09 PM
11-21-2017 01:03 PM
Snot_Shot said:
Love this thread too :smiley: Love Zenbanes very simple but to the point arguments with links to factual information. I do understand Atmos too, he and other early Pimax backers searching for moral support that they made "good" choice by backing Pimax 8K kickstarter.
I have no doubt that even Zenbane would buy Pimax 8K if it turns out to be a very good product. However, Pimax 8K promises way too much. You can sugar coat it anyway you like it but marketing Pimax as "8K" HMD is total bullshit.
Then you have delivery, quality control which is the most crucial bit of the project, post launch support, warranty support, software support and suddenly that 4.2 million raised is just a drop in the ocean. Pimax will have to cut corners and that is where troubles will start.
11-21-2017 01:36 PM
11-21-2017 02:39 PM
11-21-2017 02:49 PM
11-21-2017 04:40 PM
iJudgement said:
I understand how you feel. This post is always being updated... Luckily I can read it at work.