Hey,
I own MSI GTX 970 and I've been enjoying FC4 on maximum settings. I run the game on the latest patch, with the latest Nvidia patch as well. My problem is this.
What's up with that?! Black squares are exclusive to that brick roof texture from the chimney/elephant mission. If I turn the texture quality to low the problem disappears, but obviously that's not a solution. Then there are those white dot lines - I've noticed it just this once [first Himalayas mission from Willis], haven't seen it before. Otherwise, I have not seen any other things of that sort.
Are those graphical bugs normal, or should I start worrying about my video card?
I see the white dot lines, but you lost me on the blinking squares.
Only time I get shadowy looking boxes flashing is usually when mantling on a grapple climb. Just as I get on top of the climb I see a momentary horizontal rectangular shadow looking thing that kinda looks the size and shape of one of the text box overlays.
(EDITED)
After another look, it appears you mean the tiny shadows at the ends of some bricks looking oddly shaped and square, vs tapering off the end of each brick like they're supposed to. A video had shown it better since you say they blink, flicker, etc.