Painting camouflage can be a daunting task. When you look at real world camo it seems like it would be very difficult to pull off properly on the small scale that we miniature painters deal with. The most important thing to remember is, you are just trying to give look of camouflage but you don't need to be 100% accurate. The viewer's brain will recognize it as camouflage without each brushstroke needing to be photo realistic.
For this tutorial, we will be painting grey urban camouflage. You can use this technique to paint any color camouflage you want, even purple! You'll just need to adjust your colors accordingly.