Suggestion: A blocking wall and floor

[Belrathius]

For the devs: just a suggestion, but how about separate floor and wall tiles that look just like the exiting ones (and can use the same graphics/skins) but they function as blocking elements for transport tubes. This would allow for tubes to cross on adjacent levels but not mix, or run parallel in adjacent paths without mixing. If the choice is instead to make all floor and wall tiles blocking, please limit it to transport tubes as passing pipes through floors and walls is very important for maintaining appearances.

Thank you for your consideration in this.