So I recently acquired a bunch of the old Black Industries supplements for WFRP 2nd Ed. other than most of the material being easily converted to 3rd Ed., I was very impressed with the book, Renegade Crowns. It's an unusual location guide, in that instead of detailing each and every corner of the Border Princes, the book offers numerous tables and lists for generating your own Principalities. There are tables for creating a variety of terrain, various towns and villages, monster lairs, random encounters, and even stats and personalities for the local warlords and princes...there are even tables for creating dynamic interpersonal relationships between the local border princes (i.e. prince A doesn't trust prince B, bc prince B betrayed him 12 years ago over a land settlement...etc).
In all, it's a pretty impressive book and has inspired me to try to build a sandbox style campaign to use with 3rd Ed. Since there's such an abundance of background material for Warhammer (all the previous editions, the war game, etc), it should be relatively easy to build my own region specific tables. What I'm really wondering is if any of you have tried sandbox style games? It doesn't have to have been a Warhammer Fantasy game per-se...it could have been AD&D's Wilderlands of High Fantasy, or Ptolus: City by the Spire. I'm really just looking for examples of how these actually work at the table.