abstract architectural backdrop background barrier basic brick brick-wall bricks brickwork cement colored coloring colors coloured colouring colours constructed exterior external firm linear lines mortar perspective perspectives secure security smooth solid standard strength strong style surface surfaced surfaces texture textured textures traditional-brick-wall variation varied various wall walled wallpaper well-built art-glass artistic artistry blue bright color coloration colour dark decorative design details distinctive edges geometric geometrical glass glassy interconnected interlinked light patterned patterns shape shaped shapes stained-glass symmetrical symmetry thick thin vibrant window yellow fitted large patchwork rock-wall rocks rough rugged stone stones stonework sunlight sunshine uneven variations