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Blender has the ability to change or morph the shape of objects; other applications call this setting up morph targets. We call them Shape Keys in Blender. What you want to do is you want to select the shape, select the mesh that you're going to be changing the shape of, and go over here into the editing context. You'll have a Shapes panel. Sometimes it's hidden or tabbed to other panels, but I've broken it out separately here for training purposes. What we want to do is add the Shape Key, and the first Shape Key that you add is called Basis.
You have Relative and Absolute Shape Keys. We almost always use Relative Shape Keys because the location of each vertex is saved relative to this Basis Key. We can define this key as in 3-D view to always show the Basis shape, or whatever shape we have selected. We can also mute shapes, so that they don't take effect, so if we're just doing some testing or whatever, we can just mute out the shape if we don't want to use it. So to setup a second shape key, we just add another Shape Key and we're going to go ahead and type-in what the name of it is.
In this case, we're going to make Captain Knowledge breathe. So we want to name this key Breathe. This will be the shape that he takes when he's expanding his chest. So this is his normal posture. So we're going to tab into Edit Mode and use our Proportional Editing tool by pressing O and selecting some of those chest vertices. In side view 3, go ahead and draw them out, G, and move them out. His jaw is going to move a little bit too, because as you breathe, you're moving your jaw to suck in some air.
I'm going to scroll this down a little bit, just rises up as he breathes. Now this is very important. The shape of this Shape Key is locked in when you exit Edit Mode. So when I press Tab now, that Breathe Key is locked in. Right now it has 0 influence, but if I slide the Influence slider over you can see his chest moving. So that's how you add a Shape Key. You can switch back to the Basis Shape Key or any other Shape Key here by selecting it from the slider.
So that's how you create all the different shapes for your character.
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