That's not possible with the engine of the game. However, the new version of the engine (still in beta) has that featture. The game will probably be upgraded to that version in the future.

引用自 postmodernadventures：

That's not possible with the engine of the game. However, the new version of the engine (still in beta) has that featture. The game will probably be upgraded to that version in the future.

Thank you, can the new version still load the old save games, uncertain or?

Sadly, not. Although that update will come in the very distant future.