Lighting looks better before building: After looks like the light doesn't fade.

Hello! Relatively new to Unreal Engine. I was messing around with the level creation, and built a small house. I was messing with the lighting, but for some reason I just can’t figure out what the problem is. The shadows look static and absolutely horrendous when I build the lighting, but look how I want them to look before hand.

Before building: http://i.imgur.com/ejLsBiL.png

After building: http://i.imgur.com/KK4f3sV.png

Does anyone know what the issue of this would be? I have been trying to change some setting in the directional light, but to no avail.

Any help would be great

Floor lightmap resolution is too low and/or lightmass settings are too low.

and you are using brushes…tss tss it’s no good! For a brush, the lightmap res value must be lower to be of higher quality. Instead of 32 try 2.
But it will look even better with a standard static mesh with a high resolution like 512 or more.

Preview mode shadows looks better because it’s dynamic and doesn’t use a lightmap. A high-quality baked lightmap will look better than a dynamic shadow tho!

Go to your light settings and set Use area lights for stationary to On. This make shadows look much more realistic.