Mesh Fill Holes - Best strategy?

[AndersDeleuran]

This approach might also work here:

Close an opening like this one (mesh)

Here’s another approach that gets the naked mesh perimeters and meshes these: [2018-05-16%2010_36_47-Grasshopper%20-%20180516_FillMeshHoles_00] 180516_FillMeshHoles_00.gh (5.2 KB) If you wants quads, you can add: fm.Faces.ConvertTrianglesToQuads(3.14/90.0,0.875) After line 8.