Accidentally skipped a day here, but at this point in the process that is probably not too bad as each day's progress becomes almost indiscernible. At this point, with everything more or less in place, the objective is to sharpen things up. Get lines straighter and more clearly defined where that's appropriate. Blur things out where that makes more sense.
The most noticeable change is probably the shadows. Well, the attempt at shadows anyway. Somehow I doubt the lights as I chose to position them would really create the sort of shadows I ended up with. Especially since there would be multiple shadows from each set of lights cause of the slightly differing angle of each individual light. Though seemingly simple in principle, shadows are a bit tricky, involving angles and projections and such. Reflections are similarly difficult. I think this is yet another of those things that would benefit from some careful observation of its appearance and behavior in reality, before convincing simulations can be attempted. But, hey, maybe doing a bunch of made up shadows will give the same sort of practice and experience.
With the combined lack of tangible subject matter, and external input, one becomes a bit doubtful about the prospect of progress and improvement in ability and technique. The only critique I have to help guide me is that of the voices inside my head. Sadly, they are usually limited to howls of frustration and restlessness at being forced to sit still for so long.