How to use HDRI in UE4 4.20

[estudioae]

How to create a material to control the hdr and how to use an hdr to illuminate in UE4 4.20 (GPU lightmass)

Regards

[Pinotti]

It is a skysphere and a post-process volume.

[fco3d]

Thanks man, this explains a lot of what I was wondering how to do it
Good job!

[Wir3d]

Simple and effective, I like it.
Got some small problems using .exr instead of .hdri, but finally convert it in PS to .hdri and all was fine.