[moring]

That's how I understood it too. The misalignment was because the editor would automatically turn two one-sided lines (walls) into a single two-sided line and connect the sectors, and mess everything up. The engine itself probably didn't need the misalignment.

The engine DID need the "lots of sectors so you don't see two overlapping sectors at once", which came for free with a spiral staircase.

[justsomehnguy]

You can but you shouldn't, it really mess the engine, making essentially a one-sided... walls-which-arent-till-they-are.

I just made two sectors separately and moved one on top of other.

https://imgur.com/a/uDxMDBp