That's a really good method. Looks very nice.
I make mine more "damaged, worn , weathered, etc." (old Tamiya 1/35 scale T-34 modele rhabit)
I know a nice trick to make some of those tiles smashed, cracked or missing (I used to have Spanish Tile like that, and it gets damaged often, and Hurricanes devastate it, I can tell you what!
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Woking on my tutorial on adobe structures as we speak. (I'm doing, two versions of a design, one for Sudan/desert/middle east, one for Mexico/old west, and the interior. I have a few tricks that help crank them out and spice them up. Coming Sunday!
Thanks, I love seeing adobe terrain and tutorials!