A new "Inside Unreal" trailer from Epic games is part one of a look at some visual effects in the Unreal Engine 4. Here's word: "VFX in the Infiltrator Demo (part 1) takes a look at UE4's new visual effects pipeline, illustrating how GPU particle simulation and collision, dynamic particle lights and other VFX are used to ground the world and add richness to the environment in Epic's Infiltrator real-time demonstration."