Lightmap Resolution Problem

I have a problem with lightmap. I have never focused on this element and wanted to ask you what to do to make it red or green? How to control the resolution of a lightmap?
Thx for help.

It’s pretty much what the name says:

The car displayed in green has a lightmap resolution of 64, the small red car has also 64, but it’s much smaller, so a higher density. The big red car has a light map resolution of over 2000.

So put simply, it’s how big the light map is in relation to the size. Red = too big, blue = too small.

[Documentation Page][2]

The lightmap resolution can be set in the Editors details panel:

Or in in the asset window: