To foil the human eye basically. The CADPAT (Canadian version)
was the first in digital camo actually. The little pixels, in
various sizes and colours, is actually quite confusing to our eyes
at abt 100 metres, if I remember. This is because we cannot process
the images properly, owing to the constant break in colours.
Whereas for our no. 4, we are able to discern the leafy stripes
after awhile... 