Hey Guys, I`m new here. There is some issue with lightmap density on the floor since I made it inside blueprint for realtime changeble materials. On the screenshot you can see the lightmap density is shows purple and it looks like dont have enoght sqares to catch lighting. So after baking lights there is so poor quality, cant see anything. Only the sun which is moveble. How could fix it inside bueprint?
In your blueprint, select your floor static mesh component and on the right, in the Details panel, under Transform, set the Mobility to Static. That will allow static lighting to be built for floor. Additionally in that tab you can search for the Lightmap Density option if you want to override it.