Here is a PBR textured Copper Mortar you can use as environment object, research, Urban Criminal games of found based games.
For Default PBR Textures (4096x4096)Base Color (4096x4096) Normal (4096x4096) Height (4096x4096) Metallic (4096x4096) Mixed AO (4096x4096) Opacity (4096x4096) Roughness (4096x4096)
For UNREAL ENGINE 4 ( 4096x4096 )BaseColor ( 4096x4096 ) Normal ( 4096x4096 ) OcclusionRoughnessMetallic ( 4096x4096 )