http://www.cgcircuit.com/tutorial/houdini-essentials---flip-rendering

In this Houdini Essential series, we are going to take a look at rendering realistic looking oceans and whitewater.
We will learn how to create custom shaders from scratch to effectively render our ocean using mantra in a photo realistic manner. We will talk about the importance of environment lighting. This will be followed by taking a look at the shader for whitewater and different pscale techniques. We will also setup custom AOVs for our ocean and whitewater renders.
Last but not the least, we will take our renders in Nuke for deep compositing where we will take a look at shuffling of passes, deep holdouts, colour correcting and 2D camera shake.
This course has been designed for intermediate to advanced Houdini users. A basic knowledge of ROPs and rendering in general is needed even though we will be creating everything from the scratch.