bark botanical crack crevice forest formation grain lumber madera natural nature paint peel peeling plant texture textures tree wood wood grain background board floorboard grained grains horizontal knothole knotholes planks shiny struchture structures veined abstract appearance brown color colored colors colour coloured colours curved curves panel paneling panelling rough surface surfaced surfaces textured uneven varnish varnished wall wallpaper wood-grain wooden african bowl carved combined contain container dish hand-crafted hand-made marked marks tooled utensil wood-work wooden-bowl wooden-dish