I closed off 2 rooms and was venting out gas inside PO2 disinfection setup. I make some mistakes with chlorine so I go and reload the save then those natural tiles appears.
I reload the save then those natural tiles appears.
After that I look into my auto-save files and I find that column of natural tiles when I load a save. If I continuously play, those tiles don't appear at all. It seems to start from Cycle51. However if I load each cycles, I can see that the column is getting higher.
I am not quite sure if this causes the problem but I have 2 cats and well.. a day before all this happen, they chased each other over my keyboard and somehow open some kind of brush menu I don't know even know it exists. I quit the game because I don't know how to close it.
Thank you in advance.
ps I'm new to reporting bug thing. My apology if I am not informative or I mistakenly upload files or lack thereof.