Fade Material Out - On Collision Event. Kinda working, but not ideal... help required

Great, thanks for the quick reply.

So, I’m using a different material because I thought it might be better to have one non-translucent one, and another that can fade out. Just for optimisation-sake really.
Not sure if that’s the right way to go really.

Call me a thicko, but how do I create a function inside of my material that would be linked to my wall blueprint? A link to docs would be fine!

Thanks again,
Tim