See the capabilities of the Unreal Engine 4 in creating complex visual effects.
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.
Unreal Engine 4 2015 Features Trailer
Take a look at the features, tools and resources available with Unreal Engine 4.
Dynamic Lighting Gameplay with UE4 and Enlighten using Blueprints
Geomerics have posted a detailed article on how they used Unreal Engine together with Enlighten.