Lighting problem after being built

[Kokodanash1s]

Hi, im trying to make a game in Unreal Engine 4.27 (Because thats what my laptop can run) and i’ve made a map in Roblox Studio, before the drama and i want to continue making the game in Unreal Engine.
My problem is, when i build the lighting, the objects in a room arent being lit up, like the walls and the floor.
I’ve tried to move my light directly on the objects but it was still unlit. And i’ve tried static, stationary, and movable on the light, but it didnt change. And even on the walls, when i move back 1 meter from it, it will change.

1. Image: before building; 2. image: after building.
   How do i fix it?

[Sipitipi9999]

Hi! The first problem is your UV-s are overlapping, you should fix it on a DCC like Blender. 2. We don’t see your lightmass settings, if they are too low light will not bounce from walls to object can cause darkness. 3. We don’t see your point light settings. Maybe the light radius is to small4. Maybe your base colors are too dark too.