Have now given the textured areas another highlight and blocked in the base coat on the river a rather pasty green colour. It'll need another coat. Cheap craft paints are all well and good, but what they offer in price, they make up for in lack of coverage!
Having decided to add two more boards to give 6' depth for Heraclea, I'm back to cutting extruded polystyrene sheets and painting the edges. Again, another coat will be required and then I can stick on the vinyl grass mats and add a couple of roads. Hopefully this should go quite quickly, as I pretty much know what I'm doing this time, rather than experimenting as I go along.