This is really cool. I tried "waves in the style of Katsushika Hokusai" and got some really nice ones:

[1] https://tilemaker.app/?id=vomihsemtfhifd6hjr3ovegyoy [2] https://tilemaker.app/?id=xhz6kdyutbgbnmrvo6pqqk35vm [3] https://tilemaker.app/?id=6uktiugayrfrhepgkyy63ggzzq