I had a great idea as you could probably tell from the previous post about adding real smoke to the rural saw mill from Woodland Scenics... Unfortunately after doing some experiments I've come to realise that due to the size of the chimney it's not going to work.
Additionally, the smoke that did make it through tended to be very linear and looked like a stream of smoke rather than the turbulent smoke you'd expect to see coming from a chimney. It's quite hard to see in the image below, a very small amount of smoke is making its way out the styrene tube. Not the effect I was hoping for though!
Never fear, I'm not giving up! I have some more plans to use live smoke on the layout. My next experiment will involve some campers and a camp fire, fully illuminated and I'll do some more testing with the smoke. I feel like this will work better than the chimney as the exit area for the smoke will be much larger.