I have a pretty large stone wall built and I have it attached to some surfaces, with boundaries. Everything is looking great, however, the pattern is starting and stopping at the same point, so I am seeing it repeating. I have a lot more wall to use, so I would like to kind of pan the wall around, inside the boundary. I hope this makes sense. In the photo, I would like to move one of the walls along the y, staying on the surface and using the boundary.