Hi, I'm in the process of upgrading our project from Unity 4.6 to Unity 5.1.0f2 (currently) and I am running into Lightmapping issues. This is sort of the last hurdle we need to overcome here to be confident in using Unity 5 moving forward. That being said, I'm still prepared to downgrade to Unity 4.6 if necessary. I'm attaching my system specifications and a sample of my lighting settings for future reference. I have a number of questions related to lighting in Unity 5, but my major issues at the moment are: -the time it is taking to bake lightmaps (7-14 hours, unfinished, cancelled, on larger scenes) -lighting/lightmapping errors -artifacts on lightmaps in smaller scenes What kinds of things can I do to improve my lightmapping bake time(s)? Here is what I have tried so far: -Updated my materials from legacy shaders to the standard shader. (necessary or just rumored to help?) -lowered my lighting specifications (not low enough?) -turned off all lights but one (helpful?) -changed directional mode to non-directional -increased my GI cache to 100 GB -converted light to baked only as opposed to realtime or mixed (helpful?) -changed my skybox material to a procedural one (does this help? Will old skybox materials (diffuse) cause a problem?) I have read a few things that help, but I am not sure if these are just rumors or have been substantiated. Can anyone comment as to their efficacy? -remove standard Unity cubes from a scene (what about other primitives?) -make all objects in the scene have a scale of 1 (not feasible in my current situation) -lower the light parameters to very low for large objects (Unity's scale is relative. What is considered a large object? High polycount? Scale in comparison to other objects? Scale in transforms?) To give an idea about time: -I have a scene with about 1100 objects that I cancelled after 14 hours -I have a scene with about 30 objects that took about 30 minutes Some errors I have scene on longer bakes: -Clustering failed I need to be able to bake a large scene in about 7-8 hours time. I feel like this is a reasonable request, although I don't know if this is reasonable with Unity 5. In Unity 4.6 my bake times were about 3-4 hours with large scenes with about 1100 objects. Suggestions? Comments?