Book Image

Unity 2021 Shaders and Effects Cookbook - Fourth Edition

By : John P. Doran
Book Image

Unity 2021 Shaders and Effects Cookbook - Fourth Edition

By: John P. Doran

Overview of this book

Shaders enable you to create powerful visuals for your game projects. However, creating shaders for your games can be notoriously challenging with various factors such as complex mathematics standing in the way of attaining the level of realism you crave for your shaders. The Unity 2021 Shaders and Effects Cookbook helps you overcome that with a recipe-based approach to creating shaders using Unity. This fourth edition is updated and enhanced using Unity 2021 features and tools covering Unity's new way of creating particle effects with the VFX Graph. You'll learn how to use VFX Graph for advanced shader development. The book also features updated recipes for using Shader Graph to create 2D and 3D elements. You'll cover everything you need to know about vectors, how they can be used to construct lighting, and how to use textures to create complex effects without the heavy math. You'll also understand how to use the visual-based Shader Graph for creating shaders without any code. By the end of this Unity book, you'll have developed a set of shaders that you can use in your Unity 3D games and be able to accomplish new effects and address the performance needs of your Unity game development projects. So, let's get started!
Table of Contents (16 chapters)

Using the Overlay Blend Mode with screen effects

For our final recipe, we are going to take a look at another type of Blend Mode, the Overlay Blend Mode. This Blend Mode actually makes use of some conditional statements that determine the final color of each pixel in each channel, so the process of using this type of Blend Mode requires a bit more coding to work. Let's take a look at how this is done.

How to do it...

To begin our Overlay Screen effect, we will need to get the code of our shader up and running without errors. We can then modify our script file to feed the correct data to the shade:.

  1. Create a new shader by duplicating the ScreenGrayscale code and selecting it from the Project tab under the Chapter 10 | Shaders folder and pressing Ctrl + D. Once duplicated, rename the script ScreenOverlay, then double-click on this shader to open it in your script editor.
  2. We first need to set up properties in our Properties block. We will use the same properties...