Reduce Blocky Lighting on Smooth Face?

Hello ArcaneTheWoof,

So there are several factors that drive the resolution of shadows and lighting on models.

From the Pre UE4 :

1.) Model itself.
2.) Topology/Tessellation
3.) Smoothing
4.) Normals
5.) Light Maps
6.) UV Maps

In UE4

1.) Increase Light Resolution
2.) Enable Generate Mesh Distance Fields

I will link you to the documentation on our Wiki Page for you to study and then you can make a decision based around your project.

The first is a troubleshoot if you find yourself stuck.

The second is our official documentation on shadows,