Here's a video example of what am I talking about :
I do believe that I might just be doing something wrong, so if someone could guide me to remove these stripes, please do.
It puts a heavy strain onto players eyes and ruins my game.
Thanks for any help in advance!
UPD : Another video without rotation (Spoiler : flickering persisted)
UPD : [!!!] To other nooby people like me, setting 'Fullscreen in Browser' to 'none' removes all lines. Odd that noone could tell me that before newt hinted that