abstract architectural backdrop background barrier 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 aged architect architecture block blotch brickwall brown built clay concrete construction detail dirty gap gaps grunge historical horizontal house interior masonry material old orange pattern rock seamless stone stonewall structure tile tiled urban vintage weathered yellow yellow brick builders building construction-work holes hollow rectangular rough uneven corner corner-wall fixed merger merging mixed repaired basic windows alcove angles grime