For this test I used two images, front and back, to create a more realistic 3D model of the original fragment. The fracture has also been repaired like before. As there was no image of the sherd's sides I have estimated its depth.
[Terracotta rim fragment of a kylix (drinking cup) ](https://www.metmuseum.org/art/collection/search/669627?searchField=All&sortBy=Relevance&ft=owl+fragment&offset=0&rpp=20&pos=1)via The Metropolitan Museum of Art is licensed under CC0 1.0