"Run the simulation in your head: who moved here, what did they build, what happened to them, and then what came next?" Logic is the cornerstone of a sandbox. If things make sense -- if there's an internal consistency to what's there and where things are -- then players can make good decisions. P| ars ludi
A procedure for building a starting scenario (and the seeds for building a world) for both referees and players at the start of a new campaign.| Prismatic Wasteland