A Godot project that converts edge-only models and applies an appropiate shader to give the lines width through screen-space projected lines and miter joints.
Make sure res://assets/processed/ exists. Download res://source/code/luz-joint-import-script.gd and attach it as an import script, then import. That will create a mesh in that folder that you can then rename and move wherever. Use a MeshInstance3D to instantiate it. Then use luz-joint.gdshader as a base for writing your shader.