You can use surfaces as well, but not polysurfaces (unless you input each corresponding pair of surfaces from the polysurface, but it might not stitch well after deformation).
f you use surfaces, they have to have same NURBS structure (mean variation is created between control points of the 2 surfaces). Best to start with one module, copy, then modify control points to create end module.
Meshes do not pull smooth (edges always straight).
1 Like