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This course provides an overview of modeling, animating, and rendering 3D graphics in the open-source software Blender 2.6. Beginning with a tour of the Blender interface, author George Maestri shows how to create and edit basic objects, work with modifiers and subdivision surfaces, and apply materials and textures. The course also demonstrates lighting 3D scenes, setting up and using cameras, animating objects, and assembling basic character rigs.
Probably one of the most important tools in any mesh modeling program is the Extrude Tool, and Blender is no different, the Extrude Tool is used a lot. So let's take a look at how to use it. I have two objects here, I'm going to go ahead and select the cylinder by right-clicking on it and let's go ahead and tab into that. Let's go ahead and take a look at how to extrude on faces first. So I'm going to hit Ctrl+Tab and go into Face Mode, and let's just go ahead and select just one face here and let's just see how this tool works.
Now if we go to our Mesh Tools palette, we have two options here. One is Extrude Region, one is Extrude Individual. For a single face, these two work identically. So I'm just going to go ahead and hit Extrude Region, and then move my mouse right and left. And you can see that when I move it to the left, it makes a little hole and it makes an extrusion when I move it to the right. Left-click cancels it. So there I have some additional geometry.
So you can see how this can be used to make branches or arms on a character, legs, those sorts of things. You can really use this to make a lot of different objects. Now the difference between this Extrude Region and Extrude Individual shows up when you start extruding multiple faces. So I'm going to hit A to deselect that face and then Shift+Right-Click three faces right here. So let's take a look at Extrude Region first. When I do that, pretty much operates the same way that it did for the single face.
I can actually just extrude in to make a hole or extrude out to make an extension. Now these three faces move together as a block because we're extruding them as a region. If we extrude them individually, something completely different happens. So let's take a look at this, we're going to go ahead and do Extrude Individual. And when I do that, you can see how I actually get separation between these. So if I go in to create a hole, you can see how I get a border between those.
And if I extrude them out, we actually have separate faces. So just understanding those two differences can really show you how they work. And in fact, this Extrude Individual can be used to do a lot of really cool little effects. I'm actually going to zoom out here and move over to this sphere and I'm just going to show you something very quickly. I'm going to go ahead back into Object Mode, right-click on the sphere, and hit Tab to go back into Edit Mode.
Now when you do that, everything should be selected. If not, hit A once or twice to select everything and we should still be in Face Mode. If we hit Extrude Individual for all of these, watch what happens. If we move them out, we actually get a sea urchin type of thing, we have a lot of different faces. And if I set my Pivot Point to Individual Origins and hit S for scale, you can see how I can bring those down to points.
So I can make some very interesting objects very, very quickly. So I'm going to go ahead and deselect that, let's go back into Object Mode, right-click and select our cylinder. Now Extrude doesn't work just on faces, it also works on edges and vertices. So let's take a look at how some of that works. Again, I'm going to go back into Edit Mode on my cylinder and let's go into Vertex Mode and go ahead and just select a single vertex and let's go ahead and do an Extrude Region.
Now this actually isn't very interesting because when you extrude a vertex, all it does is create an edge that connects it to that object. So this really isn't usable geometry that we can work with, so if I'm going to go ahead and delete those vertices just by hitting the Delete key. But probably more interesting is extruding edges. I'm going to hit Ctrl+Tab again and go into Edge Mode and just right-click on one of these edges. And in this case, when I Extrude Region, you can see how it actually extrudes a plane.
So when I do that, I actually get a nice additional surface. Now for a single edge, that might not be useful, I'm going to go ahead and hit Ctrl+Z to undo this. But for edge loops this can be very useful. So I'm going to hit Alt and right-click on those edges so I select that very top edge loop, and again, just do Extrude Region. And what happens is I'm extruding this very nice surface and then if I want to, I can scale that up or down to create some additional geometry that actually might look good depending upon what you're modeling.
So these are some of the options for Extrude. Now Extrude adds geometry. We can extrude in a region, in other words as a block, or we can extrude individually which basically breaks apart the faces. We also can extrude edges and vertices.
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