Scanned PBR ground dry and wet versions 4k metal roughness texture
There are tree archives for dry and wet versions of textures and spere mesh
Ground_wet and ground_dry archives contain:
Sphere.zip archive contains:
Texture was created with several programs: metashape, zbrush, substance painter, substance designer, photoshop. Render done in marmoset toolbag 4
For more optimization you can replace the metalness map with a same map with lower resolution