How to make this shader? (Window Interior Cubemap Shader)

Hi Everyone!

I tried to replicate this shader:
but I am doing something wrong.

Original Shader:

My Shader:

Any idea?

There was a Livestream in February 2017 where there is a project download where you have this material inside. Check this page: Training Livestream - Creating Semi-Procedural Materials - Feb 7th - Live from Epic HQ - Events - Unreal Engine Forums