You might loose your mind currently. Each tile needs its own material. Each material needs to specify the rtvt. Each tile needs to render to the correct rtv.
It works, but on anything large enough to require world composition it is a massive amount of work and needless files.
if/when they patch the instances to accept interchangeable rtvs, then the process would be a little easier. Create an instance for each tile and set it up on the tile itself.