Check out a new add-on that will let you export content created using Blender to Unreal Engine 4.
Working on object packs for Unreal Engine 4 might be a bit complicated with Blender, so a Blender Nation user BLEURAVEN decide to share a tool called “Blender for UnrealEngine”. It is said to simplify the process of the export, allowing to export all the Assets of a scene at the same time, distributing them in a proper tree structure in correlation with the Unreal Engine Pipeline.