In this series of lessons we will learn how to build and render realistic oceans using Houdini's Ocean Toolkit (HOT), a powerful external tool designed to generate realistic ocean surfaces in Houdini. We'll go step-by-step though the fundamentals of HOT and how to use its Ocean SOP and its different parameters including Wave Length and Ocean Depth. We'll also go over how to build geometry that is suitable for ocean displacement and how to create a special shader from scratch to shade our ocean as well as learn how to light, render, and use compositing networks to add fog to our final shot.