We’ll start by creating our first simple shader from scratch using the basic Surface Model. We'll see how to promote parameters and build an artist friendly user interface for our shader. Next we'll add displacement to our shader and learn how to bring properties from our geometry into the shading network so that we can develop a dynamically changing surface.

By the end of this Houdini training, you’ll be able to create your own custom shaders.

Home Page - http://www.digitaltutors.com/tutorial/2282-Creating-Custom-Shaders-in-Houdini