When you use Sections to create a surface from two cross sections with connecting lines, you can elect to have the synchronization controlled by those connecting lines. If, after you have selected the two cross sections, SURFCAM detects one or more connecting lines (other than lines connecting end points), it will display the Ruled Surf Options dialog box.
This will often occur when you create surfaces defined by top and bottom profile.
Use Connecting Lines
Check the Use Connecting Lines box to create a surface synchronized by its connecting lines.
