Orucis Buildings in Maya

It's taking a while to create the buildings for my city, because I am trying to achieve creating a rough, rocky texture that is seen in Alberto Giacometti's sculptural work. I think I have managed to get the hang of it, however it means that my Maya models have an awful lot of faces. The model I was working on this morning was starting to screw up, but I managed to save it even though it's slightly different to the orthograph I drew out for it. I'm really happy with this first model, as it looks better than I anticipated, and I feel I have got the style of Giacometti in my model.