taby said:
art for art's sake. :)
To me, the Townscaper game is maybe the best showcase of procedural genreration so far.
It seems they use a 2D voroni diagram from random points to have the ground layout of a map. Then the cells are subdivided using catmull clark rules to get quads, and then the players can extude cells in those quad grids upwards to build a town:
Contrary to state of the art methods using instances of modular building blocks, this can do some organic design.