Hey everyone, For those of you who have experienced the strange bug that causes your scene to turn black and the lighting calculations to become stuck at 5/11 clustering while spewing out errors in the console window.... I battled with it for hours trying everything to get the calculation to stop or even start over. In the end, all it took was deleting TWO of my BASIC unity cube shapes that I had put in my scene. Literally a temp prop for a floor and a wall. SO, if your having this issue...try deleting your Unity cubes from your hierarchy. This instantly allowed my baking to continue at lightning speed! =D Hope this helps anyone with a similar issue! Was almost prepared to shift my entire project to a new project file.