Scratch-build by Tony Aguilar, who describes his technique:
"It's made of blue styrofoam. This is the kind made by Dupont that comes in
2" thick sheets. It used to be readily available at the local DIY store. It
is cut to basic shape using a hot wire cutter and them etched with a
toothpick, pencil or other tools depending on the thickness or depth of the
indention that is desired. The method is quite quick, as it took me less
time to create and paint this Spanish gatehouse than it did to paint one
figure. It is easy to achieve professional results as this material lends
itself very well to dry-brushing simulated stone or rock. The only downside
I can see to this material is that it is very light and therefore could be
crushed by those that are careless with it. The 60x80 Litko base it is
mounted to actually weighs more by itself than the gatehouse. The door is
just cardboard with strips painted to resemble wood planking.