I am having lighting building problems as shown on: https://answers.unrealengine.com/questions/157593/building-lighting-at-99-for-days-bug.html. I added significant detail to my terrain, and am wondering if that could be causing the problem. My computer also hangs for long periods of time when trying to build the lighting, and it asks if I want to close the lighting process to conserve memory (I select not to close it). One thing I noticed is that when you build the lighting, it apparently does it for all your levels. Is there any way I can just choose it to compile the lighting for my current level only?
Ok, so, apparently, you can build Geometry for your current level, but I don’t believe that they have support for lighting in only one level.