A brief outline of the US Army’s quest to find better camouflage patterns for troops in the field:
While the MultiCam was an improvement on the older ACU pattern uniforms, the troops did not get new packs (which also use cano pattern cloth) at the same time they received the MultiCam uniforms. Thus when troops went off into the hills, the combination of MultiCam uniforms and ACU pattern packs do a lot to ruin the camouflage effect.
The U.S. military has been having a tough decade when it comes to camouflage uniforms. Since September 11, 2001, the U.S. Army has changed camouflage patterns for their combat uniforms twice. First it was the adoption of digital patterns, then the current move to MultiCam.
It was SOCOM (special operations command) troops who first had second thoughts about the older digital camo pattern. The digital camouflage pattern uses “pixels” (little square or round spots of color, like you will find on your computer monitor if you look very closely), instead of just splotches of different colors. Naturally, this was called “digital camouflage.” This pattern proved considerably more effective at hiding troops than older methods.
For example, in tests, it was found that soldiers wearing digital pattern uniforms were 50 percent more likely to escape detection by other troops, than if they were wearing standard green uniforms. What made the digital pattern work was the way the human brain processed information. The small “pixels” of color on the cloth makes the human brain see vegetation and terrain, not people. One could provide a more technical explanation, but the “brain processing” one pretty much says it all. Another advantage of the digital patterns is that they can also fool troops using night vision scopes. American troops are increasingly running up against opponents who have night optics, so wearing a camouflage pattern that looks like vegetation to someone with a night scope, is useful.