I open your image and zoom up in a browser and I get this odd optical illusion where the grid appears about 1cm behind the buildings and stonework. Its like your houses are floating above the grid. Very weird. Anyway - liking how this is progressing. What a lot of work. it reminds me of some of the old architectural CAD work you used to see with these kind of pattern / texture fills. All the CAD apps like AutoCAD were geared up for hard copy by pen plotting on big sheets of paper so you always had line work instead of any colour fills. Sort of like D&D when it was in basic edition and old-school formats.