Extruding FacesExtruding faces is a primary function of most 3D modelling packages and it comes in very useful when modeling complex shapes. Extra detail on a surface can be achieved by extruding faces then modeling them separately. For this example we will use a simple airplane as the model in progress. When modelling symmetrical models it is common to model only one half of it then mirror it when it is finished in order to achieve a completely symmetrical model. 1. I already have a fuselage constructed for the plane, it is only the left half of the model so that I can mirror it later. 2. To form the wings I need to select the faces from which I want to extract a wing. I selected the two faces highlighted by the blue lines in the image below. 3. To get a good view while I extrude I will use the top viewport to use the extract tool in. So with a good view of the selected faces, I extrude... 4. As you can see this has moved the selected faces outward and created new faces to link them to the rest of the model. You are in essence extruding a face from the model. After I did this I then went on to shape the wing the way I wanted it. Here is the completed left side of the plane. As you can see extruding faces is an extremely useful feature. This whole airplane was made from a box and extruding faces, not bad for two minutes. This is the completed model with Duplicated and 'Mirrored Left-Right' left side, to create the right side of the plane. If you are creating a model like this, don't forget to weld the vertices throughout the centre of the model.
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