Here's a thread with a couple of techniques, including Mike's.
https://ogrforum.ogaugerr.com/t...78#70693071009750278
I know you appreciate the help, but you're already talking bench work and I don't know about David, but I think the question of grades will certainly have an impact on that. I like your enthusiasm, I wish I had more, but once you start cutting wood and driving screws, things get more difficult to change.
And it doesn't have anything to do with software expertise, David probably has me beat there with RRT, but the geometry between the 3 levels in this compressed version just isn't adding up for me. I see you and David talking in terms of 3 "levels" whereas I see 3 "places" that need 6" of separation and they're all dependent on a 4th place, the tunnels. Regardless of the implication that I think in terms of tables, the tunnels are my elevation 0" and the other levels go up/down from there. I tend to use all positive values though because I measure from the floor up and I'm sensitive to the viewing level. When I do a design, I do a full design, including bench work, so elevation 0" might actually be elevation 43". That might not make sense to you or David, but that's what I see when I look at a finished layout, so that's what I try to reproduce in software.
