Reflections on Post Process Material overlaid texture

Hi,

I’m currently creating a blood screen effect as a Post Process Material in Unreal. I want the drops to have a 3D effect. Currently, I’m only using image distortion to achieve this.
Right now, my distortion setup looks like this:

Theoretically, this works as intended. However, it still looks like ■■■■ and not 3Dish at all.

So I figured, I need a reflection / highlights on the drops, to achieve the effect I actually want.

The issue is, I have no idea ho to achieve this in a post process material. Can anyone help me out here?