Strange lighting (no lumen) with static light

Hey,
I have created something looking like a small corridor, it looks like this


But after building lights, I get something very weird.

I have a single directional light, set to static. I disabled Lumen because I want to make a mobile game ; and lastly, the meshes I am using are just the cubes provided by UE.
It may not be an issue if I add other sources of light later but I need to know what causes that problem and what I should do to get rid of it.
Thanks !

You’ve stretched the cubes to make the corridor.

The default cubes basically already have virtually no lightmap to speak of, and now even that is distorted here.

Maybe try upping the lightmap res on the cube.

Lightmap resolution changed nothing …
Should I then use my own meshes ?

Are you using a static skylight? This looks like the typical result from DFAO

Static directional light if it’s what you mean

The skylight, not the directional light…

It is looking good! :neutral_face:

Thanks arkiras for giving me the stupid answer. Switching the skylight from movable to static fixed everything.