Okay, beginning texture experimentation.  This is far from the finished texture.  Right now I'm working out how to accomplish my goal.  For the moment, I think I may only need one 2048 texture, since the green color is a set of four square's near the top, each with a different blend.  The brown is another square near the top that is used just for the greebles.  How does this appear to you guys?  Of course, the coloring will change a bit, but I'm wondering if it seems random enough . . .