For the most part you don't see big black streams of smoke from a steamer, except for oil fired or if you have a very poor fireman/coal. You might see a small amount (take a look at my steamers when they're stationary), but not overly much. When a loco is working, you will see a fair bit of steam, seeing as that is what it's using.
Of course, the current settings aren't perfect. But with tweaking I'm pretty sure it can be gotten pretty close (the main issue is that you either have this dirty, black smoke all the time or fluffy white steam all the time, it would be good to be able to have the new animated smoke/steam from TC3 that is also affected by the regulator/cutoff settings).
But, at least in my own travels behind preserved locos, I've not seen lots of black smoke (again except for oilies).
Zec
Of course, the current settings aren't perfect. But with tweaking I'm pretty sure it can be gotten pretty close (the main issue is that you either have this dirty, black smoke all the time or fluffy white steam all the time, it would be good to be able to have the new animated smoke/steam from TC3 that is also affected by the regulator/cutoff settings).
But, at least in my own travels behind preserved locos, I've not seen lots of black smoke (again except for oilies).
Zec