Following the quick start guide at https://docs.unrealengine.com/latest/INT/Engine/QuickStart/4/index.html
In step 7 I drag the Atmospheric Fog into the level but the level remains black. Any idea what could be wrong? I followed the guide exactly, added and modified a box in steps 1-4, added and modified Directional Light in step 5-6. Added Atmospheric fog in step 7 but like I said, the level remains black.