I'm learning to light a basic scene in Unreal and I'm getting some weird light glitches from directional lights.
It's better visible when I remove lights one by one.
Point light doesn't cause such glitches.
Actually I made a scene with just one directional light and a cube and the glitches were still appearing. So it's either an inherent "quality" of directional lights in UE4 or I'm doing something wrong on an even more basic level.