We painted on glass. This process needed planning. We drew the design on tracing paper and traced the back side on the back of the glass with marker. Then painted on that same side taking care to keep track of what color will be painted on top of the other colors. Turn it over and pop it in a frame to see the design. I oversimplified the process here, but you should get the general idea. And I also only got to photograph one of them. We tried to keep a winter, stylized Santa theme.