1. Variable section sweep  The Variable section sweep option is used to create a sweep feature in which the section varies according to the trajectory.

2. To make this object we have to use variable section sweep & we follow all below elements:--

3. Variable section sweep  In first we make various trajectories on different plane.  Then we use variable section sweep option & we select all trajectory one by one but in first we select centre trajectory.  Now we click on sketch.  In sketch file to take reference of trajectory points we make a cross-section & done.

4. Variable section sweep  Now we can see preview of this object.  And we also use various condition like :--  solid  Thin trim option  surface (Default)  Finally we accept this feature