Arma 3 surprisingly makes no problems at all in 4K - despite many other games.
This is not the case with 3DEN though. The interface elements are ultra small and barely usable.
Setting interface size to large doesnt change anything at all.
Sadly this is a step backwards :(
Open 3DEN with a 4K monitor.
Or check screenshot attached.
Also some weirdness when changing interface size from large to normal (2nd screenshot). Interface is rendered in fullHD whereas rest is 4k.
Solvable through restarting the game.
If im correct the Interface size is fix that means there is a new size needed or all the interface sizes need to be proportional.