In the Adding transparency to PBR recipe of Chapter 5, Physically-Based Rendering, we have seen how a material can be made transparent. Even if a transparent material can draw over a scene, it cannot change what has been drawn underneath it. This means that those Transparent Shaders cannot create distortions such as the ones typically seen in glass or water. In order to simulate them, we need to introduce another technique called a grab pass. This allows us to access what has been drawn on-screen so far, so that a shader can use it (or alter it) with no restrictions. To learn how to use grab passes, we will create a material that grabs what's rendered behind it and draws it again on the screen. It's a shader that, paradoxically, uses several operations to show no changes at all.
Unity 2018 Shaders and Effects Cookbook - Third Edition
By :
Unity 2018 Shaders and Effects Cookbook - Third Edition
By:
Overview of this book
Since their introduction to Unity, shaders have been seen as notoriously difficult to understand and implement in games. Complex mathematics has always stood in the way of creating your own shaders and attaining the level of realism you crave.
Unity 2018 Shaders and Effects Cookbook changes that by giving you a recipe-based guide to creating shaders using Unity. It will show you everything you need to know about vectors, how lighting is constructed with them, and how textures are used to create complex effects without the heavy math.
This book starts by teaching you how to use shaders without writing code with the post-processing stack. Then, you’ll learn how to write shaders from scratch, build up essential lighting, and finish by creating stunning screen effects just like those in high-quality 3D and mobile games. You'll discover techniques, such as normal mapping, image-based lighting, and animating your models inside a shader. We'll explore how to use physically based rendering to treat light the way it behaves in the real world. At the end, we’ll even look at Unity 2018’s new Shader Graph system.
With this book, what seems like a dark art today will be second nature by tomorrow.
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Current Title:
Unity 2018 Shaders and Effects Cookbook - Third Edition
Table of Contents (14 chapters)
Preface
Free Chapter
Post Processing Stack
Creating Your First Shader
Surface Shaders and Texture Mapping
Understanding Lighting Models
Physically-Based Rendering
Vertex Functions
Fragment Shaders and Grab Passes
Mobile Shader Adjustment
Screen Effects with Unity Render Textures
Gameplay and Screen Effects
Advanced Shading Techniques
Shader Graph
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