How to randomly change HDRIs used in HdriBackdrop?


First time posting here, and I’m a newbie to UE4. Does anyone know how I could randomly load and replace the hdri used in my hdribackdrop while pressing a key i.e? I have a lot of hdri images in a folder, and I would like to press a key and change randomly the hdri used in my hdribackdrop node. Is it possible?

Thank you for your help!

Any ideas? Thank you


I still haven’t find a way to achieve this (random HDRI background per frame).
Anyone has an idea on how to do this?
Thank you!