We've just added a second modular terrain-making video to our website. The first video showed how to construct a frame with rare-earth magnets and how to do the initial sculpting of the polystyrene.
The new video takes a tile with a stream set into it and covers texturing, painting and finishing.
The tiles are constructed using Terra-Former frames and are modular.
The expandable system is good for any scale from 6mm up to 28mm.