Manually stitch surface points together

User Guide > Modeling > NURBS Modeling > Stitching >

To stitch surfaces together at individual points

Select the points on the first surface.
Select the points on the second surface.
Select Edit NURBS > Stitch > Stitch Surface Points.

You can control how much each surface pulls toward the stitched point on the other surface. Select the stitchSrf node attached to the surface you want to control. Edit the bias attribute to control how much the surface is pulled to the other surface. Higher values pull toward the meeting point with the other surface more. A value of 1 touch the other surface. A value of 0 means the stitching doesn’t affect the surface at all.