I've been working on the background. It contains a few fun, but challenging elements. Most obvious is the stone wall. Granted it's easier than a brick wall or something else that has straight lines and a repeating pattern, but it's also being splashed with water which gives me a little extra work.
The stones with just some splashes on, I rendered like all the others and added the dark (wet) areas after. Those that are predominately wet, I rendered the whole stone using darker colors.