Even on large complex mesh like anything higher than 46 or 128 will usually tune red. But in order to get smooth unpixelated shadows I have to often take the lightmap up to 1024 or 2048. What gives? These values are set like they are designed for mobile or something. is there a way to adjust them otherwise the lightmap complexity view is useless for anything other than mobile games.
The coloring values are definitely outdated, they were tweaked for last gen. I think we will just remove them. However the most important thing about the lightmap density viewmode is to visualize texel size, and make sure it is what you want.