Wierd Graphical bug around textures?!

So yeah, the video will mostly explain. on every map i go on, there is a grey border/background behind every texture i go near, which then fades away as i go closer!
Anyone else getting this?

really, really annoying.

 

I am really sorry I don't know how to fix dat. But that's an amazing video.

 

Lol

{FORUM CHARACTERS TOO SHORT SO I HAVE TO TURN EVERY POST INTO A NOVEL}

 

That's interesting. What do you have your settings set to?

 

normal, and shaders high.
i seem to remember this happening after i installed some custom maps though, but ive no idea why that would interfere.