The insidious onslaught of green

The first layers of scenery continue to slowly spread across the layout.

Up on the top level, I needed to put something under my section of prefab scenery before gluing it in place permanently. As you can see below, some brown has been glued down beside the ballast. 

Those little squares where the catenary poles will go were painted as well.

A little green grass has been laid around the middle tunnel on the top level (next to the prefab scenery gap) and in the flat area on the right of the middle level, as well as a few other touchups.