Hah! If you want to step into a Hiroshi Nagai painting as a 3D world, that's basically what happens in my Ambient Garden project. In fact I was surprised that nobody ever pointed it out despite all the visitors: https://ambient.garden/
Editing to respond to multiple replies: Yes, he's painted a series of landscapes with that specific pointillism technique. The best I could find is a pretty random link, but it might be the most relevant painting: https://fortinbrah.wordpress.com/wp-content/uploads/2020/06/...
The dots make that site look very pointillist to me, and the colors are pretty impressionistic too. And it's just paths through a hilly landscape with trees as far as I can tell, none of the beaches or architectural and urban settings in Hiroshi Nagai's paintings. Maybe I'm missing something though.
Editing to respond to multiple replies: Yes, he's painted a series of landscapes with that specific pointillism technique. The best I could find is a pretty random link, but it might be the most relevant painting: https://fortinbrah.wordpress.com/wp-content/uploads/2020/06/...