I have used a pattern of black, mud brown, and khaki (tan).
Spray the entire item in flat black. Let dry. Once dry, I wrap the thing (bows, treestands, etc) in rope, going in all directions. I use different size rope, depending on the item to be camoed. This lays out your pattern. Once wrapped, spray on some Khaki, then mud brown. Leave a bit of the Khaki show.
Once dry, just remove the rope. You will be left with a brown and khaki camo that has black "limbs" going through it. You can make it light or dark in tone by adjusting the amount of brown you put on. More Khaki areas showing make for a lighter pattern. The beauty of the rope is that you end up with fuzzy edges to your "limbs" Since it is round, some of the paint sprays around the edge of the rope and blends into the other colors.
If you remember back a few years, Bear did a very similar pattern on their bows (mostly compounds) and called it Bear Illusion. Jennings did the same but had gray as the predominant color.
BP