Cracked Paving Materials
Cracked, heat damaged and over-parked concrete pavement tiles (pack available on Unity Asset Store:
Tag material
Marble Vol 1 Previews
Marble Variations Vol 1 Texture Previews (pack available on Unity Asset Store:
Concrete Test Previews (Skybox)
Assortment from Concrete & Render category with a skybox/cube-map (square version)