Wanting to know how to get a material to react to particle effect (Video link)

Hi guys!

I’m just wondering how i would get the effect shown in the video linked below.
I only need to know how to get the material to react to a force in world space.

This might be something really simple but if anyone can shed some light on it that would be a massive help!

https://www.youtube.com/watch?v=VozAvdeY8eA

Thanks in advance!

EDIT: The video didn’t show up for whatever reason, sorry!

No video linked

Sorry I didn’t realise. I know the video is of UDK but there must be a way to get the same effect in UE4