Long ago I did show little bit of the area underneath the map. That area is not random unlike all the other directions out of the map.
Here is some footage of that. I recommend watch it on youtube and click timecodes, where I picked some highlights. Mostly nothing interesting happens there 🙂
The switch of the area types happens only when you go in and out of portal doors. That would require too much time to try test every cell to figure out if the area types match the main map. That also means, if you walk into other area without entering a door then it will not change and stay the same.
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