This pack contains a selection of 36 (including variants) ground materials, all using Unity 5 physically based shading.
Materials include various stone, wood, ground and metal surfaces including some transparent grates for walkways, etc.
All textures are 1024 for the best quality and the materials include diffuse, height, normal and ambient occlusion maps for the best visuals, as well as specular maps where appropriate. All parameters have been carefully hand-tuned. Needless to say, they all tile seamlessly. The variant materials also tile seamlessly into each other.