Target Snap

As a map maker I would like the ability to target a specific tile or tile type (wall, floor, ceiling) when I try to place a tile. Limiting how many other snap points might get in the way. This could particularly be more helpful with more complicated builds. For example, when I create a multi layer wall and then go back and try to swap a door in the middle somewhere, it takes a lot of effort. Being able to select one of the wall tiles as the target to snap to and only have 4 places it could snap to would save some time. For the filter tile type, in the same example. Having the wall tile type selected would help ensure it doesn't try to snap to the floor or ceiling.