Triangle Mesh Completer plug-in is intended to fill gaps in triangle mesh models obtained from scan data. As distinct from many existing tools for this purpose, it is able to repair quite seriously damaged models. The program can fill holes of complicated shape (example 1) and is capable to connect different boundaries of a specified damaged model to restore its original topology. This ability is required if the model has one or several tunnel-like holes whose internal parts are lost (example 2) or (and) if the model’s surface is represented by several isolated mesh pieces (examples 3,4).