Directional light shines through the corners of my mesh

Development Rendering
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1

As a complete beginner to Unreal and Blender, I decided to model my house in Blender for use as a map in Unreal games with mod support.

I got my house completely modeled in Blender (interior and exterior) and I exported it into Unreal to start designing my level.

I am learning a lot, but I keep running into a roadblock with lighting. Whenever I put a directional light in my scene it shines through the corners of my house. Imgur: The magic of the Internet

I’ve watched about a dozen hour long lighting tutorials, but none of them seem to have any issue with the directional light; they just drop it in and it works!

When I add a directional light in Blender it looks totally fine. When I make my directional light moveable in Unreal, it appears to get rid of the problem (Imgur: The magic of the Internet)
but when I load up my map in the actual game I’m modding (Ready or Not) light still shines through my walls in the same way shown in editor when the light was stationary.

I’m sure I’m probably missing something pretty basic, but I have been trying to figure it out for a couple weeks and I’m stuck.

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Hi Edwid, Nice model.

I can think of 2 things: 1 your roof is not thick enough, if you don’t go outside the house you can just add other meshes to block the sun.

The other thing is “lightmap bleeding” (specifically a problem related to baked lighting) Where there are some sections of your UV lightmap island that are getting bright lighting applied to them, and that light is bleeding over into areas that are supposed to be dark.