Down in the bottom right-hand corner of Unity 5 is a little progress bar that looks something like this: I've noticed a few steps on this bar, all of which seem to take quite a while to process, such as "Layout generation" (or words to that effect), "Clustering", and "Visibility", however there doesn't seem to be any context for what the editor's actually doing on each of these stages, nor and clue as to how much more is left to run or how long it will take. Is there any chance of a "Background processes" window like the one in Final Cut which lists what's in the queue and what's left to do? Failing that, has anyone got any context for what the 11 stages are, what the editor is actually doing at each stage, and what you can do to speed the whole thing up? After installing RC2, the Editor re-imported everything in my scene and it's been sitting for over 2 hours now and it's only got to 1257 jobs on 6/11 Visibility (5/11 Clustering, whatever that means, took about an hour to finish). I'm guessing this is all related somehow to the new Global Illumination features of Enlighten, but as I mentioned above it would be useful to know what it's actually doing.