backdrop background colour colours element grain hues natural rustic series shades surface texture textures timber tones variations wood wooden abstract ocre paint painted shape shapes stripes structure structures symmetric triangle triangles triangular white yellow craft decorative diagonal handcraft handicraft nails old planks square struchture turquoise used worn barbecue bark chopped fire heating pile piled tree warm aged appearance board boards cracked cracks decking flooring grained grains gray grey knots knotting lumber outdoors outside patterns pier plank planking platform rough surfaced surfaces surfacing textured viewing-platform wallpaper weathered wood-grains brown table angles beam beams bolt bolted color colors connected damage damaged deteriorating joined lines maintenance woodwork city dark ground grunge grungy litter Soil urban