Latest iteration and the last one before adding the rest of the workers. I wanted to nail down the terrain before that step, since all the displacements had to be finalized first. Dust clouds are v2 clouds. Being a novice at clouds I started out using v3 but the many layers made the 3d view impossible to navigate and sent rendering times through the roof. Did a few searches on the forum and learned a thing or two. V2 works fine at this scale and actually renders nicer (and *much* more quickly).
By far the lion's share of my time on this scene was spent on the shoulder of the cut. That had to be right but creating the transition from topsoil to rock layer took a lot of experimenting. I ended up adding additional cube primitives for the topsoil. So now there are five cubes (two topsoil, two rock strata, plus the ledge for the towpath), with a plane for the floor. Pretty satisfied with the result.
Dune's grass, here and there, struggling to thrive in this environment.