As I mentioned, the grid would be very useful in any building system, no matter if implemented by another plugin or just events, as long as it could be turned on and off with a command. It would be useful both for strategic games and for all kinds of building, or for example a game in which you can dig a field (the grid illustration makes planning easier), also grid battle systems. Iit wouldn't interfere with anything, because this grid would only be displayed (like guides), it would not have the task of controlling anything (this is done by furniture systems or it would be the responsibility of the developer). I'll try to do some sketch, too.