Tried everything to fix the shadows ( duplicated post)

Sorry for the duplicated post, but can´t delete the other one, but i needed to insert in the right column of the forum.

I´ve tried many ways following many tutorials, forums and videos from youtube trying to solve my problem with shadows. I´ve read the documentation of it and how it works in many ways, but i didn´t know what´s going on with my project.

Tried different resolutions for Lightmap, the UV´s is ok, but appears to darken only one big mesh, the floor (not the terrain) as you can see in the pic.

This project has Skylight set and Direcional Light. Tried to change between Static, Stationary and Movable, but nothing fix it.

Please Help.

Also i cannot send the project, it´s too big.