bark botanical crack crevice forest formation grain lumber madera natural nature paint peel peeling plant texture textures tree wood wood grain abstract aged appearance background beam beams color colors colour colours cracked cracks damage damaged deteriorating grained grains gray grey lines maintenance old patterns rail rails railways rough rustic sleepers stability stable surface surfaces surfacing textured timber weathered wood-grains wooden woodwork worn black blackened burned burnt burnt-out bush bushland charred cut dead-wood green new-growth new-life plants sawn trails vegetation wildflower-plants border borders decay gloomy urban decay winter