Wireframe rendering in Unity, with vertex coloring file ?

Hi, I have a problem. I work on a project of photogrammetry, and we want to have a wireframe rendering (like architectural plan) on some assets. I tried a lot of solution, the first with a render pipeline, but while it's a vertex color shader, assets disapear, and some other, but in there one, the script replace the texture of the model to appear the edge line, but I don't have textures by my photogrammetry files (It's too long in the process). Do you have some idea to have a wireframe rendering without there issues ?