So I said that today I wasn't working due to the science fair, and maybe I'd have time to finally put in the long-missing backgrounds to the December 17 strip. So did I do that? No, of course not; I never do anything that I try to do. But I did start to put in the backgrounds. But I ran into a problem.
As it happens, I had already partially completed the background of the third panel; I'd drawn in the inn walls, but hadn't put in the tables and patrons yet. So I tried to do that... but despite repeated attempts, I just could not get the perspective of the tables to look right. It took me far too long to realize that the reason I could not get the perspective of the tables to look right was, in fact, because the perspective of the walls was off; the vanishing point was way up near the top of the panel where it absolutely should not have been. So before I can get the tables to look right, I have to fix the perspective of the walls first. I am bad at perspective. This is not surprising, because I am bad at everything.