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 Use the Mesh class to create custom shapes that go beyond Quad, Box, Cylinder, and Sphere, even procedural shapes are possible. Thank you to KayTrance for providing the sample code!
 
 *Note:* In this tutorial, we (re)create a very simple rectangular mesh (a quad), and we have a look at different ways of coloring it. Coding a custom quad may not be very useful because it's exactly the same as the built-in `com.jme3.scene.shape.Quad`. We chose a simple quad to teach you how to build any shape out of triangles, without the distractions of more complex shapes.