I dug out some Tamiya earth filler to fill some of the gaps where the building wasn’t quite flat on the base, then added three rounds of drybrush, various emulsions „Pain Au Chocolate“, „Mary Jane“ and „Ivory Tusk“. Then it was out with the PVA, multiple shades of static grass and some grass tufts.

Job done. Annoyingly the foam board has curled very slightly at the ends, so I may slap a layer of PVA and paint on the back to see if I can coax it to straighten again.