[A15 Bug or feature?] Colonists roof newly revealed areas inside mountains

[Kerbin Dallas Multipass]

...if the newly revealed area is unroofed.

This is outside of my home area and I did not declare any roofing zones.

[Jimyoda]

I've seen this happen too. I certainly expect constructors to NOT build a roof on a room that I didn't build or claim.

Edit: To clarify, I've seen builders roof pre-existing rooms out in the open. I re-read this and just noticed you said 'inside mountains'. So they actually build a roof on tiles that list 'overhead mountain'? If so, that's GOT to be a bug.

[nccvoyager]

From the original post, I'm guessing that it's actually a "revealed area" inside a mountain; that is, an outdoor (and unroofed) area enclosed by mountain on all sides which is blackness until you mine into it.
After you mine into it, if the mining tunnel is enclosed (by a door, let's say,) the "newly-discovered" area is considered a "room" and is automatically marked for roof construction.

Since I don't have access to my main computer right now...

Black = Mountain
White = Tunnel "Room"
Blue = Door
Green = "Undiscovered" Outdoor Area (Unroofed)

*Digging A Tunnel*

*Dig Dig Dig*

*Discovered New Area!*

Once discovered, the area becomes an "enclosed room" and is marked for roof-building.

[BlackSmokeDMax]

I think the fix here would be to either not have the game automatically setup new roofs. Or have a switch to set whether or not you want the game to do that. I've seen it happen often enough that I just prefer to make my own every time. Have seen some streams where roofs are made and then collapse due to existing mining orders, and the streamer just never noticed a roof being created.

[Kerbin Dallas Multipass]

@nccvoyager

Yea that's what happened.

I guess it makes sense to auto roof when it's a very small area to avoid frustrating situations like "why is my room not getting warm with 5 heaters!" but it seems counter intuitive when your miner just discovered a small valley inside mountain that could be used strategically for solar, agriculture, heat venting or mortars.

[ItchyFlea]

Bug confirmed. I have listed it on Mantis here: https://ludeon.com/mantis/view.php?id=2696 Thank-you for reporting this.