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 bark bumps close-up contrast cracked cracks curled curling curls dark dry edge edges gnarled gray grey grooves layers light mottled peeling ridges rough shade shadows shapes strips sunlight tree tree-trunk trunk uneven variations wood wrinkled wrinkles wrinkly blue caves cliff coastal coastal-landforms coastline color colour crannies formations grained grainy holes hollows landscape levels limestone outcrop rocks rocky seashore seaside sedimentary-rock sharp shore shrubbery shrubs Sizes sky stones surfacing variety vegetation weathered basic covered covering green Rendered rendering angles appearance backgrounds blocks contrasts discoloration fitted foundation foundational growth height high large moss old plants retaining retaining-wall stone stonework contours lichen rock rock-face rockface