Unity’s Enlighten lightmapper relies on precomputed real-time GI to generate indirect lighting. This can be an advantage, because changing the lighting can produce new lightmaps fairly quickly. However, it can also be a disadvantage compared to progressive lightmapping, because it imposes UV layout limitations even if you are only interested in using it for baked lighting.
To use the Enlighten Lightmapper, go to Window > Rendering > Lighting Settings, navigate to Lightmapping Settings, and set Lightmapper to Enlighten.
プログレッシブライトマッパーは 2018.1 で追加 NewIn20181
2017–05–18 Page amended