Strange warping/bending effect when turning on opengl full screen mode in v0.27.5

[doomdbhai]

See below for comparison:

https://1drv.ms/f/s!ApSZbWSxxNFzvBp8MwTbKx8BI5E-?e=gRM7qd

when using opengl renderer in full screen mode and/or exclusive full screen mode, strange "bend" effect occurs with the graphics when I am turning. This occurs in both 0.26 and 0.27. Does not occur when NOT using full screen mode.

[kraflab]

This looks like an issue on your end. I suggest looking for help either on the forums or on the discord. If it ends up being a problem with the port, then we'll take a closer look, but I would start there.