The real world objects are photographed and measured. We then recreate the object's geometry in a mesh.
Photogrammetry is made from photos, videos or scanned sequences of the real world object. The mesh that photogrammetry produce has to be modeled.
We analyze the real world objects surface to get structures and properties. Physically based rendering, PBR, is our most common approach to get realistic properties.
We can deliver any level of polycount in the mesh and every type of map in any resolution.