Hey Guises!
So, I am making a simple level out of brushes, and I noticed that even in ‘Production’ settings my shadows are crooked, when they should be straight.
Here is a picture.
://puu.sh/apiQq/a6253cc482.jpg
How do I solve this issue?
Thanks!
Increase your lightmap resolution in the bsp settings (so type in a lower value → for static meshes you have to type in a higher value) + add a lightmass importance volume 
Thanks! That solved it!
://puu.sh/apoyh/1df359f683.jpg