Sorry, I didn't realize wwconfig allowed for windowed fullscreen. I've been using Fullscreenizer for quite a long time now and pretty much use it for everything that doesn't naturally support it. @aaaaaaaaa Would be a good idea to look into this.
Nice 4K btw!
Oh nah it's not all that bad , there's an executable program called Fullscreenizer which allows you to turn your windowed games into borderless fullscreen! That way you not only receive the benefits of windowed but it looks great!
Fullscreenizer Link: http://runtimeterror.com/tools/fullscreenizer/ (binary DL is what you'd want)