I'm getting ready to do this tonight. Are you just rolling it out, or using it to make a figure? I'm going to figure route, so I'm just going to put the OD green on and put splotches of tan, brown, black, etc. on top of it. If I were to roll it, I'd start rolling the green a bit, then I'd put the little spots of other colors on top of and roll it all out together. Hope you figure it out!