CSec

Steps

1. Using any curve creation command, draw profile curves that roughly define the shape of your object.
2. Select the profile curves.
3. Pick the start of a line that will define the cross-section plane that is perpendicular to the current construction plane.
   Turning on Ortho or Grid Snap may help you control the section planes.
4. Pick the end of the cross-section plane.
5. In the plane defined at the cross-section line, a curve will be created that passes through the profile curves, and press Enter.
   Once you have made the cross-section curves, you can use the Loft or other command to create a surface through them.