I think you are referring to "ambush" schemes and thier variations. I can only tell you what I do, it may not be the best method, but it is pretty easy. Go ahead with the three tone pattern as usual, Red brown , Dark yellow, and Green. Then, just make a small set of templates with your splinters, dots leaves or what ever, lay over the base coat and spray with the contrasting color. If tigerman responds to this post, take a look at the Panther in his signature.
Steve