abstract alien background banner black card design floral frame futuristic grunge modern scrapbooking shapes spots swirls wave blue brown decay industrial metal paint pattern rust silver stain Still life photography texture urban art illustration desktop gray background powerpoint presentation shiny vector graphic wallpaper water waves waves backdrop color gray grungy plate scratch scratched architecture broke broken case-harden cement concrete construction element elements mosaic saavem slate stone textures cobble cobbled colors crystal glass green rectangular red square tile tiled equilateral horizontal padded padding polyhedron pyramid Pyramids quilting triangle triangles triangular vertical