megatronx
I've tried this method before but I don't trust multiple tiled backgrounds for some reasons, too much explain about the practices and performance, but this is ideal workaround if Ashley will say Tilemap doesn't use requestAnimationFrame. Why shouldn't we use only ONE OBJECT as one tilemap?
This tilemap, represents animated water in bottom.
opengameart.org/sites/default/files/lpc-art/water.png
Offset antimation to targeted tiles would work, we have no actions like Offset in runtime.