abstract appearance architectural architectural-elements architecture background building color colored colors colour coloured colours exterior external green painted render Rendered rough surface texture textured textures treatment wall wallpaper bars basic brick-wall bricks door metal secure security smooth solid standard step strength surfaces backdrop barrier brick brickwork coloring colouring constructed linear lines mortar perspective perspectives strong style surfaced traditional-brick-wall variation varied various walled well-built dark gray grey paint uneven cement firm angle angles historic old pre-painting stained stains streaked streaks water damage