ba1969 background canvas colors colours cosmic dirty grunge grungy rust rusty texture vintage backdrop color colour hue hues metal tint tints variations various angles appearance building bush contrast contrasting corrosion corrugated corrugated-iron corrugations decay deterioration door elements entrance exit exterior external grime height high iron light metal-work neglect old perspectives rural rural-decay rusting shade shadows surfaces textures uneven wall wear weathering rustic series shades tone tones variation