Uneven light in archviz

[son_of_man]

I am new to UE4 and I am modeling my apartment for learning purposes. I can’t get to the key to delete some artifacts like these, it would be great if someone could give me some advice as I think I am hitting a wall here.

-The ac and some pieces of furniture next to walls generate light instead of shadows.
-Most corners get uneven shadows and lights
-When I have some geometries next to each other with the same materials they have different shades of gray instead of having an even gradation along them.
-I attached my world settings too.

Thanks in advance, I hope you guys can give me a hand.

[son_of_man]

Thanks a lot everyone for your replies.

@ClockworkOcean

Is your wall single sided? If so, that’s the problem.

Making it two sided wont help, it actaully needs to have depth. You’re seeing directional light bleeding.

All my walls have volumes, I modelled them like that in 3ds Max

@presto423

Uncheck “Compress Lightmaps” and it may help.

I will try thet next time I bould my lights

@Makigirl

Hi!

…also your lightmass settings are way too low for an archviz scene…
Right now your accuracy is 0.8 cm, quality should be somewhere between 4-10 (rather 8-10), smoothness 0.6.
Unreal calculates light per object so with low settings (low accuracy + high blur) you will see seams between your meshes! If you go with 0.1 for scale (1mm accuracy) and 0.6 smoothness the seams will disappear but as you go lower with scale you’ll discover more “noise” and that’s when you’ll need to go higher with your quality!
Good luck!

OK, so next time i build I will go with 0,1 static light level scale and 0.6 Indiret light smoothness. However I fear this will take too long, as with 0.75 scale it took around 2 days to build (in production quality).

I am still betting pretty strong light in the walls from some pieces of furniture near them, any ideas why this could be?