What does the map Rebuild process for the Unreal engine do anyway?
Comparing this to Q2, Rebuilding is like compiling. It essentially puts the map together as it should be. Sometimes during the process of editing a map you can delete, move, or add stuff and the maps information won’t be correct. Rebuilding ensures that everything in a map is correct and is working as it should. Sometimes though Rebuilding will create problems known as BSP holes (talked about later).
