This is an incredibly cool mod and one I bascially can't live without since I discovered it, but it would be really cool to see a colour picker for the smog clouds like Pollution Recolour adds for water, the default clouds are very grey and I feel like a dirty browner colour might work better for a coal fired factory, or a more yellowish chemically smog for a petrochemical based factory. I understand if that isn't feasible to implement though.

It turns out the smog colour (both in-world and on the map) can be changed in the .lua files, so adding it as a setting should be doable. In the mean time, I've edited my files and it really does look great.