A lot more work has been done at this point, mostly darkening the walls with washes of Sepia with some Raw Sienna. The darker washes on the smooth paper has resulted in some interesting textures but I'll be creating more. The tones of the window and bars are about correct at this point and I have started to work on the shadows on the inside sill. Other areas of reflected light get more washes of the same mix and also some darker strokes for visual interest. I'm careful to not make it look too dirty though as although the window is very old, I still want a clean and clear look to the painting. If the washes are not left to dry properly, the result can be a muddy look which is obviously something to avoid. I still haven't decided on the bottle yet, usually at this point I would have done quite a bit of work to it bringing it along with the rest of the painting. With the darker washes added, there is an even greater impression of strong light outside the window which will be toned down a little later on as I add some barely visible tree branches and leaves.