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There are times in Blender when your models will look like they have facets, in other words, they don't look smooth. You can see them here on this sphere that we have. Each individual face is kind of rendered flat almost as a plane, so that as it moves through the light, you can see how that sphere looks less smooth and more like just a series of planes, which actually is what it is. But we can get around this by using smooth shading. So all I have to do is right-click on my sphere and in the Object Tools palette, you'll see I've got an option here for Shading.
Flat shading gives you this; Smooth shading smoothes that out so that you can actually have a smoother looking object. You can apply this on a per face basis. So let's go ahead and switch this back over to Flat and then hit the Tab key so that way I can go into Edit Mode and I am going to hit Ctrl+Tab and select faces. So I am going to deselect all the faces by hitting A and then I'm just going to go ahead and select about six or seven faces.
So I am just going to select a bunch of faces here. Let's actually go ahead and select eight faces here, let's select all of these. All I have to do now is scroll down and find that Shading option again and I can hit Smooth. Now what this does when I deselect these is, it actually smoothes out only those faces, so you can see how inside of this area, it's not faceted. Let's go ahead and do this for the whole top of this object. So I am going to go into X-ray Mode so I can select all of these faces and I am just going to do Ctrl+Select here.
So now that I have every face selected, the whole top half of this sphere is selected; I am going to shade those as Smooth and then when I deselect here, you can go out, you can see how the bottom is quite faceted, but the top is totally smooth. So this actually can be used to your advantage in modeling; if you want something to have a crease or a sharp edge, smooth it as flat. If you want it to be more smooth then you can always use smooth shading.
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