Unity 5.x Shaders and Effects Cookbook

Unity 5.x Shaders and Effects Cookbook

By : Alan Zucconi

Buy this Book

Unity 5.x Shaders and Effects Cookbook

By: Alan Zucconi

Buy this Book

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.

Unity 5.x Shaders and Effects Cookbook

Credits

About the Authors

www.PacktPub.com

Preface

Free Chapter

Creating Your First Shader

Introduction

Creating a basic Standard Shader

Migrating Legacy Shaders from Unity 4 to Unity 5

Adding properties to a shader

Using properties in a Surface Shader

Surface Shaders and Texture Mapping

Introduction

Diffuse shading

Using packed arrays

Adding a texture to a shader

Scrolling textures by modifying UV values

Normal mapping

Creating a transparent material

Creating a Holographic Shader

Packing and blending textures

Creating a circle around your terrain

Understanding Lighting Models

Introduction

Creating a custom diffuse lighting model

Creating a Toon Shader

Creating a Phong Specular type

Creating a BlinnPhong Specular type

Creating an Anisotropic Specular type

Physically Based Rendering in Unity 5

Introduction

Understanding the metallic setup

Adding transparency to PBR

Creating mirrors and reflective surfaces

Baking lights in your scene

Vertex Functions

Introduction

Accessing a vertex color in a Surface Shader

Animating vertices in a Surface Shader

Extruding your models

Implementing a snow shader

Implementing a volumetric explosion

Fragment Shaders and Grab Passes

Introduction

Understanding Vertex and Fragment Shaders

Using grab pass

Implementing a Glass Shader

Implementing a Water Shader for 2D games

Mobile Shader Adjustment

Introduction

What is a cheap shader?

Profiling your shaders

Modifying our shaders for mobile

Screen Effects with Unity Render Textures

Introduction

Setting up the screen effects script system

Using brightness, saturation, and contrast with screen effects

Using basic Photoshop-like Blend modes with screen effects

Using the Overlay Blend mode with screen effects

Gameplay and Screen Effects

Introduction

Creating an old movie screen effect

Creating a night vision screen effect

Advanced Shading Techniques

Introduction

Using CgInclude files that are built into Unity

Making your shader world modular with CgInclude

Implementing a Fur Shader

Implementing heatmaps with arrays

Index

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Introduction

All the lighting models encountered in Chapter 3, Understanding Lighting Models, were very primitive descriptions of how light behaves. The most important aspect during their making was efficiency. Real-time shading is expensive, and techniques such as Lambertian or BlinnPhong are a compromise between computational cost and realism. Having a more powerful graphics processing unit (GPU) has allowed us to write progressively more sophisticated lighting models and rendering engines, with the aim of simulating how light actually behaves. This is, in a nutshell, the philosophy behind PBR. As the name suggests, it tries to get as close as possible to the physics behind the processes that give a unique look to each material. Despite this, the term PBR has been widely used in marketing campaigns and is more of a synonym for state-of-the-art rendering rather than a well-defined technique. Unity 5 implements PBR by introducing two important changes. The first is a completely new lighting...

Unity 5.x Shaders and Effects Cookbook

By : Alan Zucconi

Unity 5.x Shaders and Effects Cookbook

By: Alan Zucconi

Overview of this book

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Unity 5.x Shaders and Effects Cookbook

Introduction