Lets you fill up holes in a mesh.
Taut: The size of the triangles used to fill the hole matches the size of the neighboring triangles.
Faired: As above, but we attempt to maintain curvature properties across all of the triangles that fill the hole. This is the default.
Maximum number of edges a hole may have in order for it to be filled. The default is 150.
Attempts to fill all the holes that have a number of edges smaller than Maximum Hole Size.