Sean doesn’t write much, but when he does, it’s damn cool stuff. Check out this post on using C3D to deal with tunnel intersections.
take the edge off Roads, Drains – Intersection Assembly Sets for Tunnels (part 1).
And I’m using Press This now, so be ready for more quick link articles as I’ll be linking to what I find and what shows up in my C3D/CAD related feeds more often.