I was wondering; is there a way to color coat the wires in the material editor? I thought I remember seeing someone do it before, or maybe I’m thinking about the Blueprint editor…
If there is, I’m not aware of it. It would be a very handy feature though! It would also be nice to “pin” wires in place and group them together like you would using cable ties in real life.
We should put in a request. That’s a great idea.
Looks like there is a page on the issue tracker for color coded wires: Unreal Engine Issues and Bug Tracker (UE-18302)
Everyone who wants this feature should vote on that issue because they do take popularity into account. My idea of adding pins might not be as easy to implement, but maybe I should make a thread for it in the Feedback forum.
Nice link. I just voted. You all should vote too. 
#makethematerialeditorgreatagain