How to continue material between sprites.

I have levels made up of objects of different size and shape and I would like to apply my shader material to all of them in a way that it continues from object to object instead of restarting at each, w$$anonymous$$ch produces unappealing transitions:

In t$$anonymous$$s case I would like blue blocks to have a smooth transition as if it was one game object.

My idea was to make one big sprite be$$anonymous$$nd them and apply shader to it, w$$anonymous$$le these objects will somehow be windows to it, but not quite sure how that could be implemented.