So, I guess all of you can understand that maplestory is an old game. I got 2k screen and the 800x600 looks really ugly on that when full screen. Ugly is a cute word of having black screen both corners. Is there any way to scale it so I'll be able to see in a full screen without black borders?
I assume your monitor is not 4x3ratio. If you "scale" it, you will actually stretch it and your character will look fat (and everyone else too) I've often played this way.