I've posted something about this before, but this is more a general question regarding resolutions in games.
So I load up a game, go to Options, and change the resolution to my native desktop res. My main question is this - what exactly is this doing?
Is it changing the image sizes? The window size? Why, if I set it to a much lower resolution, does it still fit full-screen yet look like the image itself is pixelated? I'm trying to understand this so I can eventually implement it into my game, but I'm not quite sure where to start.