It seems that most of the work was really in the layout; I stopped after only an hour. By the way, this is a dead branch, one of many collected under my yard's oak. Spending so much time with my little subject leaves me wondering its demise. Was it temperature, or invaders, or disease to which it succumbed?
Up to this point, my subjects have all been dried out and gone by. I still have a few fallen leaves I'd like to tackle, but I am on the lookout for something green and alive.