black black metal blue corrode corroded decay grunge grungy industrial metal rust rusty tool tools urban urban decay black-and-white carbon design font monochrome pattern ceiling fairground light lighting lights metallic nature pavilion roof sky structure montage screw sheet metal 3D abstract broken chain reflection Rendered ancient Greece Greek handicraft helmet history iron odisea odyssey protection soldier texture troya war warrior advice danger handrails high mobile non-slip patterned rails ribbed sign silvery stairs steps warning yellow