In this chapter, we'll take a look at all the tools that come with HDRI. In some cases, I'll need to get very technical, but I'll refer to the practical application wherever possible. The main goal here is to give you an overview of the tools that can be incorporated into an HDRI workflow. Whether you adapt the workflow proposed later in this book will be a decision only you can make, but this chapter will provide you with the background knowledge you need to make educated choices.