Terrain: Spanning the earth with buildings

I have three on the go here. The large building I showed the other day, which has a Middle-Eastern-cum-North-African-cum-Middle-American vibe, and a pair I had been working on before: a woodsman's cottage, which would probably dwell in the North American continent, but could sit in Europe quite happily, and a longhouse. Both these last were inspired by the nice little farmhouse at Terrain for Hippos. Right, so I've plastered the large building and the longhouse, put a spot of sand on the bases, and then it's just securing that sand and I can move on to painting. Here's how they look right now.