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Hello to everyone again,

I'm looking for an addon or a short cut to fill fast and simmetrically a NOT FLAT surface that needs to be closed with vertices. Doing it manually it takes a lot of time. I tried to do CTRL F and then Grid fill,but it didn't work. Neither F key works. Check the attached screenshot. thanks.

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Have you tried using only the "grid fill" tool?

Like this, select the hole edge ring:

enter image description here

then use grid fill:

enter image description here

and you get

enter image description here

It should work when a grid can be inserted, if it does not, can you post your model (better on https://blend-exchange.giantcowfilms.com/ as it's permanent)?

Edit: following your comment: I opened your file, and tried.

When I used "grid fill" on that selection, an error is shown, but is not "select two edge loops", it is "connecting edge loops overlap"

enter image description here

Anyway I deleted that "edge" that joins both sides of the "hole", and selecte the whole "hole" edge ring, and then using "grid fill" it shows the error you said: "select two edge loops".

I think (edit2: I was wrong, see below) the problem here is that "grid fill" expect correct topology (eg: only quads), while here you have a nice mesh, but technically the topology is very bad (I know, because I'm very good at bad topology :D).

In particular (at least) in the beak zone you mesh edge loops are "broken", there are n-gons, tris, and because of this probably the grid fill tool can't decide how your mesh is flowing around that hole, and how it should fill. Ngons are terrible for good mesh tobology. Even tris are, but they are easier to solve, afaik.

An example:

enter image description here

Having and keeping a good topology is fundamental to have good "edge loops" to allow any loop tool to work predictably, and it is also fundamental for mesh animation deformation, btw, for the same reason: a good edge loop flow allows the animation system to know exactly how the mesh should deform. But that's another story.

See this a similar issue answered in the past by @cegaton, Curved mesh topology

Sometimes, bad topology can be fixed, but often is a pain, but instead of rebuilding from scratch, another path is to learn retopology, ie, recontruct another "good topology" mesh based on a "bad topology" mesh.

Edit2 : no, I was wrong, the problem is that the hole should have the same number of vertices on left and right, of course (thanks to @Jerryno for correcting me).

These are the different sides (bottom edge is not subdivided as the top one).

enter image description here

I tried to subdivide it with CTRLR, like

enter image description here

getting

enter image description here

Now, selecting the full edge border again grid tool "completes". It could be necessary to edit span/offset settings, just after applying the grid fill tool, to get better results.

this is bad

enter image description here

this is better

enter image description here

this seems quite perfect

enter image description here

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  • $\begingroup$ your method didn't work. it says : "select two edge loops". I attached the blend file. thanks. $\endgroup$ – Marietto May 18 '16 at 8:22
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    $\begingroup$ @Marietto to fill a hole it has to have even number of edges (vertices) $\endgroup$ – Jaroslav Jerryno Novotny May 18 '16 at 10:12
  • $\begingroup$ ...oh yes, of course... that's right. I didn't check :D sorry $\endgroup$ – m.ardito May 18 '16 at 10:58

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