Unreal Engine shader for Substance painter. (update)

 Since Substance Share https://share.substance3d.com is no more and what they have now does not allow uploading shaders, I will post it here and on twitter.
I highly recommend using Temporal Anti-Aliasing from Display settings view.

If there will be a demand for 

anisotropy 

and clear coat,

 I will  add that later.

 download UE4shader

changes: 
Allegorithmic are still using aged IS algorithm in their main shader that causes poor looking reflections.
I've updated the importance sampling to the state of the art random sampling and made temporal accumulation useful.