Patch

Fill a closed area, defined by boundary curves or surface edges, to create a 3D surface. The new surface maintains tangent continuity with adjacent surfaces.

If the area you want to patch is open, you can use the Blend tool to close it.
  1. On the ribbon, click the Surfaces tab.
  2. Click the Patch icon.

  3. Click the boundary curves or surface edges, and then right-click to confirm.
    • To simultaneously select adjacent edges, hold down Shift while clicking.
    • To select a single curve or edge when the two are tangent to each other, hold down Alt while clicking.
  4. Optional: Modify the shape of the patch using internal profile curves.
    1. In the guide bar, click Internal curves.
    2. Click the internal profile curves, and then right-click to confirm.
      Note: The internal profile curves must intersect the boundary curves or surface edges selected in the previous step. If there are multiple internal profile curves, they should not intersect each other.


  5. Optional: Define the continuity.
    In the guide bar, select one of the following options:
    • Positional: Connect the patch surface without tangency to the surface edge.
    • Surface Tangency (G1): Fill the hole with a smooth, continuous patch without sharp edges at the seams.
    • Surface curvature (G2): Fill the hole with a smooth, continuous patch without sharp edges at the seams. Also, the patch follows the curvature of the adjacent edges.
  6. Right-click and mouse through the check mark to exit, or double-right-click.