In this lesson video, we are going to discuss different methods of patching holes in vendor. In here, I have a monkey head model. If I select these two faces at the top, press X, and then choose faces. After doing some modeling or deleting some of the mesh elements in your model, you might end up with a hole like this in your geometry. to patch a hole like this, we can use the F shortcut, but first, we need to select the vertices or the ages around the hole that we want to fill. To select the vertices around the hole.

We can do this using the Select loop method. We can do this either in a vertex mode or in the H mode. Just move your mouse cursor on top of any of the ages at the whole border. hold the Alt key and then click. Now the ages are the vertices around the hole get selected. Then we can press F to fill out the hole with a new face.

Let me undo this If you forget the shortcut, you can also access it via the vertex menu. You can see the new H or face from vertices command with F as the shortcut, or you can also access it via the right click pop up menu, provided you have some ages or vertices selected. If you have none selected, then when you right click, you will not see the option. Okay, now if we fill a non quad hole using the shortcut Blender will use a large non quad polygon to patch the hole. So most often after you do this, you need to fix the topology by adding some ages to fix the core issue. As I mentioned earlier, the most ideal topology is to have all of the faces in your model as quote type polygons.

We can use the knife tool to fix this. So we can press K and then create an age here or we can also use the JSON shortcut to do that, select this vertex first, then this one also, then press J. Another method of filling the hole is by using the grid field command grid field will automatically create quad faces when filling the hole. This way, we do need to fix the topology afterward. But because it is based on quad structure, grid field can only work on quad type holes. To show you how it works.

Let's take a look at the backside of this monkey head model. Notice these four phases have quad structure. If we delete them, we have a quad based whole, go to the H mode or Vertex mode. Then hold out and click on one of the ages at the whole border. To access the grid fill command, we can go to the face menu, then grid fill. We can see it doesn't have any default hotkeys assigned to it.

Click it and the hole is now auto filled with a nice grid of quad faces. Now if we have a non quad based hole, this grid field method won't work. For example, we can say this face in the back of the monkey's ear is a triangle, not a quad face. If it's like these four faces, and then the LED to create a hole, then go to h mode, select the border and try to fill it with the grid field command Blender will throw us this error message. We can fix this face by using the knife tool and move this vertex down a bit. This way we have a quad based hole, we can see if we try to grid fill the hole again.

Now it works. So again, make sure you have a quad based hole in order to use the grid fill feature. Another method of filling hole is by using the Alt F shortcut. Personally, I almost never use this method as it produced this triangle based on polygons. So for example, let me just undo this several times. Here we already have a non quad hole.

If you press Alt F, we can see the patch topology are triangulated like this. If you forget the shortcut, you can access it via the right click popup menu and then feel here or by going to the face menu, then feel