/3/ - 3DCG

I need to set up a simple material in eevee. It shouldn't be photorealistic, just needed for conceptual schemes. No reflections, no cast shadows, nothing. It must be as plain as possible.

I need to displays cracks on a church. I have the model, I've mapped it, I've tryed to sketch the cracks and everithign works smootly.
Now the point is that I need to show all the walls at the same time. The idea is to set up a transparent materia, to see the cracks on the foreground on the intended color, and the ones on background a bit faded. Something like writing witha sharpie on a transparent ikea box.

I've tryed a lot of tutorial ranging from "not even close" like in pic related to a close result but with the lines in the bacround hard to understand due tu reflecs and shadows.
Any clues?