Very Nice, Love the rocks man!
Awesome walkthrough, I really learnt a lot. It was great that Adrienne give links to other people tutorials too!
Anybody get that?
SideFX has shared a video that will show you how to use the motion vector ROP. The guide also gives a brief overview of the material setup in UE4 and goes into some of the details regarding how to calculate a useful vector in texture space.
You can download the latest motion vector ROP from the development branch of Game Development Toolset on GitHub by SideFX.
Not enough? You can find more info about motion vectors and creating a UE4 material in this tutorial by Klemen Lozar: Frame Blending with Motion Vectors