One of Canada's most widely known contribution to 21st century warfighting has been the invetion of pixelated camouflage patterns. It became widely used by combat troops in the West's south Asian wars.
The original pattern looked like this:
The desert pattern looked like this:
But now the Americans have discovered this Canadian, pixelated camouflage is pretty successful to hide buildings, even aircraft:
The idea behind this camouflage isn't to keep you from seeing something but to keep you from spotting it at the outset. If you don't spot it, you'll move on and look somewhere else. The longer you look at something the less effective the camouflage.