I suspect it is. My issue with the Unity 5 project I have is that the on demand baked light probes are 450MB+ and this exceeds GitHub's 100MB file size limit. So now of course I need to reduce this asset size. I'm suspecting that if this asset is the result of baking light probes that less light probes will reduce the size of the asset. 1) Any other ways to reduce the size of the LightmapSnapshot.asset in Unity 5? 2) Is 450MB+ normal for this file? There are just over 950 light probes in the single light probe group that is baked. So that's nearly 0.5MB of data per light probe. If this isn't expected behavior I'll try to reduce down to a project that I can report via Bug Reporter / FogBugz. Cheers.