I have had a number of comments and questions recently about terrain manufacturing and what you need to get started. Let me state that I enjoy making terrain as much if not more then I like painting minatures or even possibly playing a game. There is something just wholesome about making a terrain project in my mind that is just special. After all, unlike a miniature, a good terrain project is something that is unique and completely your own. Sure, there are molds out there and kits like the Games-Workshop ones (which are really cool I might add and I have a bunch of them in my collection as well), but if you want something special to play on then you need to be able to make it yourself.
Terrain can add huge flavor and fluff aspects to your games. Perhaps your playing your dwarfs and want to fight a battles where your dwarfs are defending their hold. Another idea could, could be that you feel your empire Arch Lector wants to take the battle to chaos and your battles take place in the far northern mutated chaos wastes. Making your own terrain can add so much to your games.