It looks like choosing the Single Lightmap option generates only the far lightmap, correct? Is there any way to generate just the Near Lightmap? If not, having “Single GI/AO”, “Single Full”, and “Dual Lightmap” options would be great.
In single lightmap mode, the Far Lightmap is used for all lighting distance (like the old terrain lightmapping in 2.6). As far as I can tell, in Dual mode, the Near Lightmap is just the ambient light level and the bounce intensity and boost.
What do you want the Near only for?
EDIT: That is, the Near lightmap does not include any shadows since the realtime light creates them of you are using dual lightmaps and shadows.
If you REALLY only want the ambient light in your lightmap in single mode, bake in dual mode, save the near lightmap off as a separate file, and then switch modes and reattach the near map to the map array.
For games using an overhead camera, everything in view will be closer than the near/far cutoff. If you bake a single lightmap, dynamic shadows won’t affect the lightmapped surface. Dual works fine, but if there’s any additional time cost to baking two different lightmaps, I’d like to be able to avoid it as baking takes forever as is.