Faux stained glass. Frame prints upright, glass prints upside down. After printing glass, flip over and insert into upright frame. HummingBridBackground.stl added on 6/21/15... Glass prints at 5 layers at .3mm. I used 2 perimeters, 0 top, 2 bottoms, 20 percent infill of your choice to print the glass. Note: Try different infill patterns at various sizes to create more visual interest in your finished model.