Truth

Hey man, I did some search and found screenshots in  %game folder%Renegade\Client\Screenshots
So your answer is the best here.

 
@Truth That prorgam might be convinient for other cases, don't worry.

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!

OK. I will try this one if there's no easier way of solution. Thank you.
 
...hidden hax for renegade built-in :d

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)

Have you tried turning it off and on again running the game in windowed mode?

Glory be to the Father, and to the Son, and to the Holy Spirit, as it was in the beginning, is now, and ever shall be, world without end. Amen.