Faux stained glass. Frame prints upright, "glass" pieces print upside down. Flip "glass" pieces over after printing and insert into upright frame. Pic of model shown was printed using only 2 layers for glass, but I prefer to use honeycomb infill on the glass. I print glass using 2 perimeters, 0 top, 2 bottoms, and 20 percent homeycomb infill. If you print glass solid, it will not allow enough light to show through the finished model. Glass in this model prints at 5 layers at .3mm. Glass is flipped over after printing to have the smooth, flat side showing on the outside, although, model can be viewed from either side.