In 3D or CAD rendering, for example, I want to render a certain wood, how to find his material ah?

3D: In the main toolbar, click "Material Editor", select any blank material ball, click behind the diffuse reflection, add a "bitmap", in the pop-up menu, look for the wood picture material on your computer, and then open it. Then give the material ball to the object you want to render, and then click Quick Render, you can see the effect. (There are a lot of things that you have to adjust to render a better result, like highlights, softness, highlight levels, etc! (That's too much to go into!)

CAD: CAD rarely renders anything, you can add a mapping to see the effect!