Proxy mesh and merge actors?

Stephen Ellis suggested I ask this here.

In the 4.3 patch notes there is two entries that I can’t find information about and wonder what they do?

  • New: Proxy Mesh tool now produces
    assets in a separate packages.
  • New: Proxy Mesh and Merge Actors tool now
    use more consistent names for a
    produced assets (demolet naming
    conventions).

Is this something similar to Mesh proxies in UDK where you could combine meshes into a simpler version to use with LOD? I think they were made using Simplygon and as far as I know Simplygon isn’t available in UE4.
If not, is there anything else that can do this? Without it the whole modular workflow get a lot more complicated as simply giving each tiny piece some simpler geometry for LOD isn’t enough.

I’m bumping this now.