I've since moved my sewing table to the opposite corner of the room. The design wall is on the western side and the sun shines on it most of the day, giving me natural light for photographing quilts. And I have a big LED light in the center of the room, which is perfect for working underneath. My fabric is out of the way of direct sunlight on the eastern wall, reducing the fading effect of too much sun.
While cleaning out a few drawers I found several stashes of soap slivers which I use to mark fabric, but really, how many do I need? I tossed out half of these.