Great video on the making of the Blade Runner Hades Landscape, from Douglas Trumbull's Immersive Media and Visual Effects site. Via Daring Fireball.
Pretty amazing when you consider they did this in the days before you could just throw it to your 12 year old neighbor with the fast computer to whip up in a couple of hours in Maya or whatever is the go-to app for 3D modelling these days. Still, doing it the old way with miniatures has more "soul" than these new fangled CG effects...