its just a matter of hitting the key "print screen" and paste that wireframe image into your 2d editing app, and blending it with your vue render. which works, but i still think it would be nice with a real wireframe render option in vue, especially for the object/segment of choice. of course u can also use materials to make it look like a wireframe, but still not the same thing, anyway i guess its not a big thing since u can get the effect u are looking for.