Creates a new surface by fitting a cap over a surface edge that forms a closed loop.

Button
Ribbon: Surface tab
Create
panel
PatchNot available on the ribbon
in the current workspace
Menu: Draw
Modeling
Surfaces
PatchNot available in menus
in the current workspaceYou can also add an additional curve over the closed loop to constrain and guide the patch surface.

When you create a patch surface, you can specify surface continuity and bulge magnitude. If the SURFACEASSOCIATIVITY system variable is set to 1, associativity is maintained between the patch surface and the originating edges or curves.
The following prompts are displayed.
Select Surface Edges or Curves
Select one or more closed surface edges (not the surface itself) or one or more curves. You cannot choose both edges and curves at the same time.
Measures how smoothly surfaces flow into each other. The default is G0. See Understand Surface Continuity and Bulge Magnitude. Select a value or use the grip to change the continuity.