This is the first part of a "book" in which I try to gather the basic concepts of the Pixel Processor node. This part covers basic but very important concepts. These are the building blocks that allow us to create complex and powerful nodes in Substance Designer. The examples start from simple to more advanced by gradually increasing the complexity of the topic. The PDF document can be downloaded with this link: https://drive.google.com/drive/folders/15icIdDfqHS_F2EWB6bX0gvbYwMga70D5?usp=drive_link