You can create a surface between a closed loop of curves.
You can create a filling surface without star point from 1 to 4 one or multi-segment edge curves to be specified. You can influence the transition quality by selecting adjacent geometry as projection base and/or by adjusting the normals at the transition edges.
Before you begin: Open a 3D shape containing a surface cluster having a gap consisting of a closed loop of edge curves to be filled.
From the Surface section of the action bar, click Fill.
Select the edges in the loop of surfaces and click Apply.
The surfaces to fill will be created automatically.