To manipulate the resulting group of NURBS surfaces

• Use Edit NURBS > Stitch > Global Stitch.

  Stitching makes the patches deform as one surface, but the patches are still regarded as separate surfaces when you assign materials. You can also use the other stitching operations under the Stitch submenu.

• Use Edit NURBS > Attach Surfaces.

  Attaching creates a new continuous surface and is regarded as one surface when you assign materials. You must apply Attach Surface repeatedly, one patch at a time. Be aware that the order you attach patches affects the placement of any textures you might apply to the surface.

Notes

• The Subdiv to NURBS conversion does not convert the UVs of the subdivision surface.
• When a shader is assigned to a subdivision surface and the Subdiv to NURBS operation is applied, the shaders are not transferred to the resulting surface.