abstract background color colored colorize decay design element iron metal old orange pattern plate red rust rusty steel urban cover diamond diamond plate meter meter cover object rectangle shape texture construction elements industrial industry large pile piled pipe pipelines pipes bark card floral flower flowers grunge nature plant rock stone wood ancient armored brown buildings castle flotexture joint knights medieval plates protection sheets ballast blue metal bolts gravel parallel rail rails secure shine sleepers stable tracks transport triple bucket deep dig digger Dirt earth equipment excavator excavators ground grounded scoop abstact boat colors nails pebbles rocks rotten sand sea ship sky textures water bolt corroded corrosion engineering grungy line rivet row series