Well, they'll start off black, but if I move my camera at all, any outer textures (the sky, trees, my own character, chat bubbles) will overlap that black, and... well, "stick" to my screen. Basically, it's transparent. Sometimes I'll even get rainbow colors, but still some patches have that weird texture glitch.
But, yes, I've turned down my graphics settings about as low as they'll go, not helping me, though. ;/