Troubleshoot NURBS surface does not appear when rendering

User Guide > Rendering and Render Setup > Rendering > Visualize and render images > Visualize scenes and render images > Troubleshooting Rendering >

If a NURBS surface is disconnected from its shading group, it will continue to be drawn in shaded mode but will not appear when rendering. This is different from polygon objects which will not appear in shaded mode in this situation. Make sure that your NURBS surface is connected to its shading group, and then try rendering again.