The Oz window is starting to take shape. Here you can see the three figures of Glinda, Ozma and Dorothy coming together against the sky. Once the window is completed and dark lead lines are in place, the colors will be more vibrant. I've started painting faces and details on various pieces, but there's still quite a way to go!
Painting on glass is very much like china painting. The paints are actually powdered minerals which get mixed with water and gum arabic, and are fired onto the glass in a kiln. Each layer of color is fired separately, so a painted piece can have quite a few trips through the kiln before it is done. The faces seen here have had two firings, and will still have a couple more. In glass painting, you generally start with the detail work and then add layers of color - which is, in a general way, the opposite of regular painting.