Medium post (Filling holes in 3D mesh): https://vovaprivalov.medium.com/filling-holes-in-3d-mesh-using-meshlab-fea6849ab7a1
Common problem with 3D meshes is incomplete surface with holes. That could be caused by imperfect reconstruction algorithm or low quality in depth sensor.
We can easily repair surfaces of mesh in Meshlab program. Meshlab includes special filter for filling holes in 3D meshes.
First open Meshlab. Then import mesh: File > Import Mesh.
Here is an example of mesh with holes