Yo guys I had the same problems but I worked out how to fix it, waht you do is you turn every thing off or to its lowest ( I mean everything) then you exit the game then click on the shortcut to start up arma2 again then you can turn everything to its max and not have the blocky and no texture problem. It works for me so it should work for you.
ArmA2 8GB RAM Problem
in ARMA 2 & OA - TROUBLESHOOTING
Posted
Yo guys I had the same problems but I worked out how to fix it, waht you do is you turn every thing off or to its lowest ( I mean everything) then you exit the game then click on the shortcut to start up arma2 again then you can turn everything to its max and not have the blocky and no texture problem. It works for me so it should work for you.