In Grasshopper, I extruded these volumes as surfaces.
However, when meshed (plugging the polysurfaces into a mesh component) they look like this.
Using the Mesh command on the surfaces, I was able to reduce the mesh’s density using these settings:
However, there still is a significant number of triangles that I would need to edit manually to get even close to a workable mesh.
Isn’t there a more straightforward conversion of planar surfaces to Ngon meshes?