It's art.. meaning if the artist wanted to add tile pattern just because they are able to.. it's very likely that the tile patterns/drains etc. are just an addition for artistic purpose. What pool has fucking ropes hanging down like that, what are the odds of the paintings showing kids clearly hanging from ropes in a pool? What are the odds of the bench pictured in the painting resembling the Vanderbilt pool. The tiles are extra imo. The artist can add whatever