This is a set of modular rocks. With just these two formations, you can fill a large space.
The meshes have** 400k-500k triangles. So they are better used in **Unreal Engine with Nanites.
But you can make the mesh density you need in Zbrush because there is a high-poly version there.
Meshes also has uv mapping.
In Unreal Engine has customized materials, textures, and masks for rocks.