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Modeling revolves around the editing of meshes.

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But what are meshes?

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A mesh is a collection of vertices, edges, and faces that describe the shape of a 3D object.

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But then you ask, what are vertices, edges, and faces?

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Vertices is the plural form of vertex, which represents a single point.

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Edges are the line segments between vertices.

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And faces are flat surfaces enclosed by edges.

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But some software will also call these polygons.

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You've probably heard the term polygons or polys when people refer to 3D models.

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If a model is made of polygons, it is a mesh.

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These are the building blocks of all meshes.

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And modeling involves the manipulation of these building blocks to create a 3D mesh.

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So how do we create meshes?

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Well, we already have our cube here, which is a mesh, but let's try to add another mesh.

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If we go into the Add menu we had used before to add objects, you'll notice that it looks a little bit different.

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Because we're in edit mode, Blender only allows us to add mesh shapes.

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These are the same options that belong to the mesh category in the Object Add menu.

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Let's go ahead and add a UV sphere.

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Right now, it's a bit hidden within our cube, so I'm just going to go ahead and hit G to move it outside.

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As you can see, this UV sphere is made of vertices, edges, and faces.

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And so it is a mesh.

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It should be noted, however, that adding meshes in this way will add the mesh shape to the original cube object's mesh data.

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If you toggle back to Object mode, you'll notice that both the sphere and the cube are considered as a single object.

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If you want to add a separate sphere object, you're going to want to use the Object Add menu instead.

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You can do this by going into Object mode in the top left.

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Then go to the Add menu, go to Mesh, and select UV sphere from there.

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We will go into the differences between object and edit mode in a separate video.

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Now that you're able to create meshes, it's time to learn how to start editing them.