Shape > Trim Surface
Converts a 2D spline drawn in the front (xy) view into a renderable
surface with the same shape as the original spline. If additional 2D
splines are linked to the spline being trimmed, they will be incorporated
into the trim surface as well.
1.
In the front view, draw a spline. If you prefer, splines can be imported
from Adobe Illustrator.
2. With the spline selected, click Shape in the main tool palette.
3. Click Trim Surface in the lower tool palette.
