Exterior?

[amber sphinx]

I don't understand why the game detect this like the outside ;-;

[novel cave]

because you added it onto an existing structure. You will have to put up a wall and a door to seperate the two.

[devout fern]

Finally someone that doesnt add tons of mods to make the game easier

[crude hazel]

I'm pretty sure that's not the reason

You are probably just missing roof tiles ?

[amber sphinx]

Nope

[amber sphinx]

Actually it was

I put the walls and is ready

[crude hazel]

[amber sphinx]

Ty

[novel cave]

NP