That's actually working as intended. We're sure looking into it at some time, but it actually works as it is supposed to work, as maps aren't 3d. It's nothing to expect anytime soon, though, just to be honest.
Well, i can understand this can be partly frustrating, as we both agree that this is not how it should work from a game-design point, but it's technically not broken and the amount of work required to change the whole system for such little benefit is just a bad trade-off at the current time of lots of stuff that is more important.
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