aircraft airplane background detail engine flying metal pattern plane power texture transportation turbine turbo bolt brick course damaged industrial mortar nut orange post rough scratch wall wood worn bolts hardware machine nuts rust rusted rusty screw screws ancient armored brown buildings castle decay flotexture iron joint knights medieval old plates protection sheets abandon abandoned age aged corrode corrosion decrepit discarded paint peel peeling rusting rusting away textures blue-metal chips concrete embedded granite gravel patterns pebbles rocks shapes size Sizes slab stones surface