abstract appearance backgrounds bare bark brown bumps close-up colors colours cracked cracks dead dry edge edges gnarled gray grey grooves layers lines moss mottled patterns peeling ridges rough shades of colour shapes smooth strips Stump sunlight surface surfaces texture textured textures tree Tree Stump tree trunk trunk uneven variations wallpaper wood architectural backdrop background barrier brick brick-wall bricks brickwork cement colored coloring coloured colouring constructed dark exterior external firm linear mortar perspective perspectives secure security solid standard strength strong style surfaced traditional-brick-wall variation varied various wall walled well-built basic