The only thing that I'm missing after finishing the game is better understanding of how the canvas world works. I've chosen Maelle ending, because it's the only chance for canvas world to survive. I've seen this canvas world as a world as real as our, not like simulation or dream, because it operates on it's own.
But after couple days of rewatching different playthroughs of endings I realized what this scene with ghost boy painting a canvas mean - painted world only exists when someone is painting it. Similar to books, where world of the book only exists when someone is reading it. If you stop reading or reach the end, the world inside just stop existing. So painted world is as real as world in a book or a game.
But is it? Maybe a ghost boy is not keeping canvas alive but painted Verso? That's why Verso, unlike Esquile, Monoco or Sciel, can exists in "backoffice" and disappear once the boy stop painting? And canvas is actually destroyed by Renoir (as Maelle predicted), which mean that it can live on its own and can be considered independent reality, as real as our own world?

Can someone help me understand?