Fit To Faces

Instance On Points drops a rigid copy at a point. This maps the tile into the face's own corners, so on an irregular grid every tile takes the shape of its cell instead of being a square in a non-square hole. That is what lets a relaxed, organic grid carry authored geometry.

Wire an index and it picks one part per cell, which is how a neighbour rule chooses a different tile. Keep Shape mode scales and turns the tile instead of distorting it, for props that must not warp.

The tile fills its cell wall to wall by default, because the tile's own bounds become the cell. Raise the margin for grout, streets or a reveal between tiles.