And that was the challenge! Just stack something. I had these very small bowls which happened to compliment each other perfectly! The painting was kept loose and free. Who could ever manage all those shadows, cast and reflective and more! You can see more on http://www.dailypaintworks.com/Challenge/28AF0AA5-636B-4840-9E08-F08BE8084FE5 and look under the balance challenge!
My stacked is 5 x 7 and done in oil.