Collection Gravel Ground (Seamless) :

Created entirely in Substance 3D Designer.

I used VrayDisplacmentMod and displace modifier.
I added displacement ground map.

2 variants of color Gravel Ground / HighDetails / 4K PNG PBR / Seamless

Base color "PNG 8 bit"
Normal Map "PNG 8 bit"
Roughness "PNG 8 bit"
Ambient occlusion "PNG 8 bit"
Displacement "PNG 16 bit"

In the archive:
* .max
* .fbx
* .obj
* .mtl