 In English flushwork, limestone and dark knapped flint are used.Windows may be set in a diamond-shaped lattice.In Chinese carved lacquer, a convention developed by which the areas of sky, water and floor or ground that would be left largely blank in paintings are filled in with discreet patterns derived from textiles, known as "diaper backgrounds" and also "brocade-grounds" ( , ‘embroidery[-like] background’); this convention has continued to modern times.