Starting to Look Like Something

I purchased a set of Woodland Scenics earth-tone washes, in addition to a slightly larger bottle of earth ground cover.  Although my layout is pretty small in the grand scheme of things, I still wasn't sure if the bottle of ground cover would be enough to cover the whole set.  As it turns out, watering it down 1:1 with water produced the look I am quite happy with, and ended up only using slightly more than half the bottle of ground cover.

The set of earth-tone washes has also come in handy.  I've used quite a bit of the cement color under the bridge and around the round table, and black for some clean-up around the track and inside the tunnel (obviously).  So, what's left for the white plaster you can still see is going to be either rock, or rock wall.  I plan on using the light umber colors to give the rocks a yellow-white-ish color... I think thats what I'm going to go for - a raw gypsum look.