this is a picture of a small piece of town i did (bigger and more detailed images in my gallery). i made a terrain and started with the little building on the left and added the other buildings/objects later. as you can see, this way the buildings can be very different in size and shape. maybe 'holes' can be filled in later by adding a wall or a garden or something? remember: i can only use sketchup and i don't know details about other 3d progs!

"The light at the end of the tunnel may be an oncoming train"