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Unity Character Customization: Modular 3D and Spine 2D
More than 260 informative pages about building modular character customization systems in Unity 6 with 3D and Spine 2D.
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5.0 out of 5 stars from 1 ratings
Joseph Hocking
First Edition 2026
262 pages
Who is this for?
Unity devs building player-driven customization.
Unity developers building games that require player or character customization.
Game designers building flexible systems.
Game designers looking to create flexible character systems for RPGs, shooters, or open-world games.
3D and 2D developers working with Spine.
2D developers using Spine who want to implement dynamic character customization features.
Programmers looking for a solid codebase
Intermediate C# programmers who want to build modular, reusable customization systems and persist player choices with save/load.
Character customization is one of the features players love most, and one of the hardest for developers to get right. What starts as a few interchangeable parts quickly turns into tangled code, broken animations, and player choices that disappear between sessions. Unity Character Customization: Modular 3D and Spine 2D shows you how to avoid that from the start. Written by Joseph Hocking, author of Unity in Action, this book guides you through building scalable customization systems from scratch in Unity 6, for both 3D and 2D games.
You will learn how to modify models, materials, and textures in real time, attach modular parts to your 3D characters, and build an intuitive customization interface with UI Toolkit. You will also use Scriptable Objects to configure your options and save player choices as JSON. You will then move into 2D, where you will import characters animated in Spine, swap skins and body parts, and change colors on the fly, ready to drop into your own gameplay.
You will learn how to modify models, materials, and textures in real time, attach modular parts to your 3D characters, and build an intuitive customization interface with UI Toolkit. You will also use Scriptable Objects to configure your options and save player choices as JSON. You will then move into 2D, where you will import characters animated in Spine, swap skins and body parts, and change colors on the fly, ready to drop into your own gameplay.
Content Included.
Table of Contents.
1. 3D Characters in Unity.
- Planning the Test Game.
- Importing a Character Model.
- Analyzing the Elements of a 3D Character (mesh, bones, material, texture).
2. Attaching Parts.
- Discussing Use Cases (clothing, weapons, body parts).
- Importing All the Models.
- Building UI for the Player to Use.
3. Using Custom Characters in Game.
- Refactoring How the Customizer Operates (clean code separation of concerns: UI tells customizer component to apply changes, rather than making changes directly).
- Persisting the Configuration Between Scenes (character prefab).
- Customizing the Character in the Game Scene (add Play on the customizer UI).
4. Changing Textures & Colors.
- Discussing Use Cases (skin tone, variant outfits, team colors).
- Importing the Various Images.
- Add Textures to the UI (list on customizer component).
- Add Colors to the UI.
5. Further Code Improvements.
- Acquiring New Skins.
- Saving the Custom Character.
- Starting the Game from a Menu (New or Load).
6. 2D Characters with Spine.
- Understanding the Types of 2D Characters (spritesheet vs. skeletal animation).
- Analyzing a Character from Spine (atlas texture, sprite parts, bones).
- Importing a Character from Spine (install spine's runtime for unity).
7. Changing Skins & Colors.
- Discussing Use Cases.
- Setting up Spine Skins.
- Programming the Customizer Component .
- Tinting Spine Attachments.
- Building UI to Control the Customizer.
8. Improving the Customization Code.
- Creating a button to refresh the scene.
- Refactoring the code so that customizations are preserved when scenes are loaded.
- Serializing configuration data in JSON format.
- Adding buttons to the user interface for saving and loading.
9. Attaching Parts.
- Adding parts to Spine characters.
- Configuring data-driven parts.
- Creating custom checkboxes in UI Toolkit.
- Refactoring the code to optimize memory usage.
Featured eBook Bundle.
Unity 6 Creator Essentials Bundle
Get +490 pages of practical content covering character customization and editor tools in Unity 6, all bundled at a special price!
$49.98
$42.73
Save $7.25 - 14% off
About the author.
Frequently Asked Questions.
What do the books include?
Our books are crafted to provide a deep understanding of each topic with step-by-step explanations, real-world examples, and practical exercises. Each book includes detailed chapters, illustrations, and code samples designed to help you build skills as you read. All of our eBooks are downloadable in PDF format, making it easy to access them offline anytime. Many books also come with supplementary downloadable assets or files to support your learning.
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Our books, which are published chapter by chapter, are also updated regularly until they are considered complete. This approach allows you to benefit from the latest information and improvements as you progress through the material. Once a book is finalized, it remains available in its completed form, and you'll have access to any free updates within the same edition that may include fixes and small improvements.
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This course includes:
- Skill level:
Intermediate
- Language: English
- Software: Unity 6
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