windowed or FS does not change the game at all!
IMO it's a different feeling how you recognize things and react to them. It's like changing the fov while playing from 110 to 130 for example.
It's just a different way of aiming according to screensize!
I was running 'borderless' windowed mode (using shift window) so the screen was exactly the same as fullscreen, also tried it without using the shift window but the result was same. Check the demo and see for yourself what the difference is.
I think it's well known that the game reacts to user input differently at different framerates. I think that is due to missing mutlithreading. The engine can only calculate an internal frame every displayed frame, thus the game will calculate movements with less frames when your gpu is limiting. You can even use that effect. For certain jumps, some people change their maxfps settings so they are able to do the jump. Also, its normal that your framerate changes when changing the game's resolution or video settings. Enough explanation?
As i mentioned, my FPS didnt drop the slightest, stayed still at 1000 FPS. Also, thats a reason why i have chosen dopjump not pbcup_renoir for testing purposes.
I know that, with windows 7, using a theme that has the circular start button (or any shape that goes above the taskbar), the framerate is lower when the window is under the start button (I guess because of the way windows draws things with transparency), even though the framerate in-game is displayed the same. It's visibly stuttery. It's possible windowed fullscreen has the same issue. Do you have the problem if you play in a smaller window that doesn't overlap the start button?
Good idea, but unfortunately not much much changed. I guess there was some slight change in the behavior, i was able to do the jump slightly more consistently, but still not as consistently as i would be able to using fullscreen and the behavior still felt...well weird.
EDIT:
Running windows 8.1
GPU: AMD Toxic 9R (or w/e lol)
RAM: 16GB
CPU: Intel I7 (and some numbers, not that its important, just thought i would throw it in here)
What i found out so far, is that the PB window generates pretty differently to other games. There are basically 4 'modes' in which the window can be displayed.
1)Fullscreen, simple basic one, works nice
2)Borderless, but with forced overlapping and everything (basically the way payl modified .dll for windowed mode AND also quite few applications can do the same) - in this case, paintball behaves normally AS IF it was in fullscreen. Also it has forced Always on top and its impossible to get anything displayed over it (tried getting livesplit on top of paintball, but failed. Tried countless of apps to do this 'good' borderless mode, but all did the same)
3)Borderless, BUT with windowed mode ONLY positioned correctly so that it looks like borderless (basically X,Y positioning changed, still overlapping), but it behaves like windowed mode, making it hard to do the jump i showed (and many others)
4)Windowed mode, pretty much same as above, i guess slightly better in terms of jumping, but definitely not 'correct'
Gonna do some testing with compatibility modes i guess, havent tried that yet