"I think one modeller could send the end bits on to the next modeller and that would enough to give the second modeller a starting point and be able to match up the ends. I Also think it would not be a good idea to model any 'hidden' sides, just wasted polys; unless the buildings where going to be stand-alones that could be used individually." - This is basically the same thought I was trying to convey when I mentioned the idea of one artist completing a model and sending a "template" or outline to the artist doing the building next to it. Glad to see we're basically on the same page.