I spent the first week of the new year working on this tunnel, I think these techniques will work great in any scale! Have a pop over to my blog to see how I did them. https://kootenaymodelrailway.wordpress.com/2016/01/08/how-to-build-tunnel-liners-concrete-and-rock/
Really nice work! Looks totally real. Must have been very satisfying to get that look. Thanks for the link.
The next to bottom picture, where we are looking into the empty tunnel, says it all. That looks so real. Nice!
