I used oils over AB'ed acrylics. The cobble base is from a Lowes home goods detail bathroom tile piece I got on sale. The individual bricks were 'glued' to a 4"x7" backing. It was intended for a detail stripe in a bathroom. I just pulled each individual piece off and used them as I saw fit. The grass is hand planted from a wheat stalk product from Military Miniatures and the rest is scratch.

