I ran into a bug that the smog effect from heavy industry doesn't load in my game. As can be seen from the screenshot, these furnaces are billowing smokes, but air around them are clear as day. I like having the smog effect giving a visual cue for pollution and an industrial feel. Without it the game just doesn't look right.
I tried disabling all mods, switching between DX11 and 12, and reloading saves. Nothing worked so far. This bug only showed up after the High Life DLC update. I did not run into this bug before.
After some additional testing, it seems that later smog effects would replace the earlier ones, so that when I first place down a heavy industry, its smog effect will load, but as I place down more and more, earlier industries no longer load their smog effect. Although the process is random.
Please help.