Win8.1 judder in landscape(flipped) [working WA proposed]

"mrkaktus" wrote:
I've done more research and it looks like WA proposed by me is not working (which is REALLY weird).

Please look at this 3 situations:
1) Oculus is in "Landscape" mode, so that everything renders rotated by 270 degrees and looks "flipped", game renders exactly the same as in Windows 7 where display is properly positioned. There is NO judder.
2) As I'm rendering using OpenGL I'm using such modification of scale and offset on Windows 7 to take into notice flipped Y axis in Framebuffer:

I really, really, wanedt to say that I believe you are definitely on to something. I've been working on a demo in UE4, the magic combination for the most part has been the 0.4.2 runtime and UE4 4.6.1, it has just worked for me. My monitor at home doesn't really like being overclocked to 75mhz so I've left it at 60 and I always run in direct mode. Anyhow, going forward Unreal is going to force you to use the latest (being 0.4.4) just to work. No matter what I do, I just can't get a smooth rotation with 4.7 (release 3) and 0.4.4 together. In extended mode or direct mode.


Anyhow, I tried what you suggested, ran in extended mode, but in landscape mode. Of course everything in the game is reversed and upside down. BUT, I've never seen performance that flawless in the Rift and Unreal.

Going to do a little digging myself, and see what options I have for getting a quick fix working for me. I'm not so worried about having users having to replicate this behavior any time soon, as I'm just looking to have this run on one or two machines.

You rock!