See the capabilities of the Unreal Engine 4 in creating complex visual effects.
Lightmap Creation for Unreal Engine 4
James Butcher shares a free tutorial on how to create lightmaps in Unreal Engine 4.
Unreal Engine - Open World Demo Collection - Free
Epic Games are giving away assets from their Open World demo, to be used within Unreal Engine 4 based products.
Dynamic Lighting Gameplay with UE4 and Enlighten using Blueprints
Geomerics have posted a detailed article on how they used Unreal Engine together with Enlighten.