I`ve been looking at this game but there is supposedly a bug that makes buildings suddenly vanish. There`s a thread on Steam from March 2023 discussing this bug but it is unclear if the fix was ever included in any official update. A review on Steam from June this year also mentions a bug that makes buildings disappear.

Is this bug present in the latest offline installer build from GOG?

Never encountered this bug. Sounds like a graphics card issue.

A bit late, but…

No. It’s an actual problem with the game itself.

Explained in more detail here:

https://steamcommunity.com/app/271240/discussions/0/3787002282763402562/