I have been making quite a few foam core buildings for a new board I have planned. It's going to be an urban type board with interchangeable buildings. All made from foam board (or foam core, depending on where you are from).
My latest building project has been coming along nicely, I have been working on the Cathedral type building and have managed to get it textured and based. I have also added a pavement to the base for that urban look.
The texture is baking powder (don't know where I got the idea for that from!)