In one half-hour session I taught my friend Perry Garvin how to capture images for photogrammetry. This is the resulting model which I have cleaned up and textured in Rhino and ZBrush. The tops of the heads were unreachable as we did not have a ladder inside the Metropolitan Museum of Art.
To see more about this sculpture follow this link: https://www.metmuseum.org/art/collection/search/248483?searchField=All&sortBy=Relevance&ao=on&od=on&ft=marble+grave+stele&offset=0&rpp=20&pos=1
Marble grave stele with a family group