I love that HN has a diverse set of topics, I didn't mean that. I mean: here usually the artistic and literature stuff appearing are more interesting. This looks like the average Facebook art content with many upvotes.

Ah, I understand what you meant now.

Without judging the artistic merit of these pieces, I submitted the OP only because the idea and process of "painting" on glass with a hammer struck me as cool and interesting (pun intended). In any case, artistic merit is always in the eye of the beholder.