Is there news about this?
On the Simplygon site I see “Simplygon is directly integrated into the native editor of Unreal Engine 4”.
In the Unreal documentation I see “Automatic LOD generation uses Simplygon to create simplified versions of the base mesh to be used as LODs.”
Also: “Unreal Engine 4 leverages Simplygon to provide high-quality mesh reduction without having to leave the Unreal Editor. Developers can quickly simplify meshes, generate LODs, and immediately see the results in their maps.”
However, I am not able to find any specifics on how to set it up in UE4.