Seems like this issue was thought as not a bug... http://feedback.dayzgame.com/view.php?id=18039
That's actually very annoying and must be a bug and I was amazed to find that it's resolution is not a bug.
This is how it looks like https://www.youtube.com/watch?v=qjB-sR4L6g8
This didn't happen before those new animations came a while ago.
Have a one handed weapon or no weapon at all in your hands and your hands must be down, not raised.
Lean back or forward, which means move mouse up or down. Best example is to look at your feet.
After that use the free look button (Alt) to look around.
Start to jog. With sprint and walk it doesn't work.
Now when you look around you should see the same behaviour as in the video.
Another video (sorry about the audio):
https://www.youtube.com/watch?v=qkoTsc8Cs84
it is because you character actually leans a bit to the front when running.
now you lean to the front irl, and tell me you still see everything horziontal, wihtout making some strange head movement
Yes I see everything horizontal if I've my head leaned front and watching left and right.
How it's currently in DayZ is not how it shoul be at all. It can cause even some motion sickness on people and it looks freaking stupid and buggy as you can see in my video. If that's a desing decision then it's very bad one.
It's not a design decision, we are just having trouble reproducing the issue shown in the video the same way, the behavior seems okay on our end.
Rest assured we are looking into it :).
Sorry I wasn't enough specific. I'll write a repro. It's very simple:
Have a one handed weapon or no weapon at all in your hands and your hands must be down, not raised.
Lean back or forward, which means move mouse up or down. Best example is to look at your feet.
After that use the free look button (Alt) to look around.
Start to jog. With sprint and walk it doesn't work.
Now when you look around you should see the same behaviour as in the video.
I think that happened with two handed weapons before but that probably got fixed some time ago.
Another extreme video about the issue. Best reproed when sprinting with 2h weapon and freelook somewhere. Sprint and don't and you see that extreme changing. Also freelook when sprinting is like in a rollercoaster.