See how Unreal Engine 4 technology allows the creation of 3d volume texture explosions.
Unreal Engine Sizzle Reel
Epic Games have posted a showreel of games and media created using Unreal Engine.
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.