What about this? Wall is 0.25 meter width (1/4 of current width and also 1/4 of grid). It will only be eyecandy. Game will see it as 1 meter thich wall (pax won’t walk on it, nothing can be placed on it except doors and windows, the rooms cannot be added on it, areas will be covered under the wall) but players will see it as 0.25 meter thick wall.
Of course current doors and windows will need to be changed to adjust these walls.
Making the visual part of the wall a fraction of the tile would create some awkwardness I think. For example, how would you position a sofa up against it? If you are creating a wall through the middle of a foundation, what determines which side of the tile it goes on? Would walls become a rotatable object?
I feel I would become irritated by a single wall attempting to symmetrically cut a room in half only to have it off to one side.
Regarding the windows, I think it’d be interesting if they served as a passenger amenity, boosting their satisfaction and/or fun, so you would see passengers occasionally stop and look out.
Looks Good, but if i may make a suggestion: Split it up in 3 pieces, 2 endings and a centerpiece. This way people can make it as long as they want without having wallpieces inbetween.
The model you show here is already prefect for the plitting in my opinion, 3 blocks endpieces and a 2block centerpiece.