abstract alphabet-A arrow concrete direction Dirt dirty discoloration discolored discolouration discoloured gray grey grooved grooves non-slip path pathway patterned paving raised rough Soil soiled surface surfaced surfaces texture textured textures uneven abundance appearance background bits bulk chips chopped color colored colors colour coloured colours cut cut-up quantity selection shapes Sizes split varied various wallpaper wood woodchips aged angles beam beams connected cracked cracks damage damaged deteriorating grained grains joined lines maintenance old patterns rustic surfacing timber weathered wood-grains wooden woodwork worn blank board brown close-up empty fiber fiberboard flat grain grunge hardboard image macro material panel part pattern plank plywood slab space wall yellow casing external firm hard hardy inside natural nature outside plants seedpods seeds shape shaped shell smooth tactile two-sided variations woody wrinkled wrinkles