This is the old-method Parametric Truss definition. Interestingly this quickly became a solid solution, used and taught for years. I couldn’t find a better answer yet. As Grasshopper updates, some of the components in this definition change but the overall structure remains. Subdivision of a free-form surface and addition of geometric components has, of course, a wide range of alternatives. Maybe we should combine this with different problems and solutions we’ve talked about earlier on this website. Here are the geometric model and parametric definition files. [3DM: truss] [GHX: 0.8.0066] The same solution can be found, explained step-by-step at designreform and other places a couple of times.