How to fake stained glass windows. Supplies Tissue paper Scissors Mod podge A large bowl Paint brush. Towels Cut your tissue paper anyway you want. I did triangles. Pour mod podge in the bowl Paint part of the window with the mod podge. Place cut tissue on top of mod podge. Then paint over it with Mod podge. Create any design you want. Be sure to clean the window good before you start and place towels on floor below you cause it gets messy. And wear old clothes.