Book Image

Unity 5.x Shaders and Effects Cookbook

By : Alan Zucconi
Book Image

Unity 5.x Shaders and Effects Cookbook

By: Alan Zucconi

Overview of this book

Since their introduction to Unity, Shaders have been notoriously difficult to understand and implement in games: complex mathematics have always stood in the way of creating your own Shaders and attaining that level of realism you crave. With Shaders, you can transform your game into a highly polished, refined product with Unity’s post-processing effects. Unity Shaders and Effects Cookbook is the first of its kind to bring you the secrets of creating Shaders for Unity3D—guiding you through the process of understanding vectors, how lighting is constructed with them, and also how textures are used to create complex effects without the heavy math. We’ll start with essential lighting and finishing up by creating stunning screen Effects just like those in high quality 3D and mobile games. You’ll discover techniques including normal mapping, image-based lighting, and how to animate your models inside a Shader. We’ll explore the secrets behind some of the most powerful techniques, such as physically based rendering! With Unity Shaders and Effects Cookbook, what seems like a dark art today will be second nature by tomorrow.
Table of Contents (16 chapters)
Unity 5.x Shaders and Effects Cookbook
About the Authors

Using basic Photoshop-like Blend modes with screen effects

The screen effects aren't just limited to adjusting the colors of a rendered image from our game. We can also use them to combine other images with our Render Texture. This technique is no different than creating a new layer in Photoshop and choosing a blend mode to blend two images together or, in our case, a texture with a Render Texture. This becomes a very powerful technique as it gives the artists in a production environment a way to simulate their blending modes in the game rather than just in Photoshop.

For this particular recipe, we are going to take a look at some of the more common blend modes, such as Multiply, Add, and Overlay. You will see how simple it is to have the power of Photoshop Blend modes in your game.

Getting ready

To begin, we have to get our assets ready. So let's follow the next few steps to get our screen effects system up and running for our new Blend mode screen effect:

  1. Create a new script and call it BlendMode_ImageEffect...