Springheel, really enjoying the videos. I’ve built by main house and sealed it up fairly well. I began working on an outdoor city street area and got a little carried away. Ended up with a few winding streets without really considering sealing and visleafs. Lesson 2 warned against that very thing, I know! Outline is here: http://imgur.com/97ze0OY For the time being I’ve just thrown a big portal sky around it all. Looking at your prologue map, the streets seem to be sealed with very large brushes of caulk and visportals. Should I be thinking of doing the same?