Apply material from UE4 to part of model

Hi

Ive created a glowing material on UE4 that I really like, I can’t achieve the same effect using any other texture editing software like substance painter despite following tutorials online.

Im trying to add glowing lines to a leaf model, I wish to be able to edit the models textures in substance painter/photoshop etc, but I want to be able to then apply this glow material from within UE4 to the required areas on the model (the model is only for use in UE4)

here is a diagram to illustrate further my question

Is this possible in anyway?