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Blender is a powerful open-source tool for 2D and 3D graphics, full-on animation, compositing, and post-production. It is used to create movies and special effects, even in HD. In Blender Essential Training, Roger Wickes offers new Blender users a thorough explanation of its interface, tools, and features. He also demonstrates practical techniques and shows how to access the online and openndash;content resources of this amazing tool. Specific 3D techniques covered include navigating in 3D space, using cameras and lights, and rendering. Roger demonstrates how to rig, animate, and composite a character over live action. Exercise files accompany the course.
Here is an example of using multiple materials to color a mesh. We have an example from Big Buck Bunny and here is a clump of flowers that have been modeled and textured and they are shown here in 3D view. If we select any of the individual flowers, we see that it's outlined in green. That tells us it's a group of different objects and if we come into the materials shading context, scroll this over a little bit, we can see that this one flower consists of three materials.
The first material is a yellow, which is called the button. The second is the leaf and the third is a pink petal material. Now, each of these materials can be in turn just a single, simple material or they can have all of the different texturing that's available. So as you can see with this pink petal material, there is all of these texture channels. These seven texture channels then combine to make the net result that we see here and the net result when we render.
So there is a nice little bouquet of flowers. If you want to give your own special one a virtual flower, just go ahead and open up that file and render it. So, each object in Blender can have multiple materials just like we saw with Captain Knowledge, as well as, now with these flowers, and you cycle through them like that. Now, you assign different parts of the mesh to have different materials by tabbing into Edit Mode and then selecting the faces that you want to have the different colors. So we are going to go ahead and here click on Face Select Mode.
If you come over to a particular material that you like, let's say the third material, I'm going to deselect all of these. Now, when you press Select over here, Blender selects the faces of the object that have that particular material assigned to them. We can cycle through and let's say here is the green, we can select it again. Then if we wanted to know a particular face, what material it was assigned to, all we need to do is click the question mark here and then Blender will cycle through all of the available materials and tell you which material that particular one is.
If we want to add on a new material, let's say we wanted to change the variation of the stock or something later on or further down here, all we need to do is click New here and then that adds on a fourth material on to this very same mesh. The name of the material is shown here, as well as, then over in materials where you have full control over all of the colors and aspects of the material, as well as being able to cycle through the materials here, so now I can cycle back down through. When you add on a new material Blender goes ahead and copies the current selected material as kind of the basis for you to start from.
So, our fourth material is exactly the same as the yellow except that it's named .001 as indicating that it's a clone of this yellow button color. Once we get done defining this color, then we need to go back over here into Edit Mode and select the Faces that we want to have that new color and then assign by coming back to the Edit panel, then clicking Assign here to assign those faces to this new color. Now this part, this time is going to be colored yellow.
That's how you assign multiple materials to the same mesh.
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