Version: 2021.3
Language : English
  • Unity User Manual 2021.3 (LTS)
Unity User Manual 2021.3 (LTS)
Unity User Manual 2021.3 (LTS)

Unity User Manual 2021.3 (LTS)

Use the Unity Editor to create 2D and 3D games, apps and experiences. Download the Editor at unity3d.com.

The Unity User Manual helps you learn how to use the Unity Editor and its associated services. You can read it from start to finish, or use it as a reference.

If it’s your first time using Unity, take a look at the introductory documentation on Working with Unity, and see the Unity Tutorials.

New

Packages

  • Learn about packages: Working with the Package Manager
  • Find documentation for a specific package: Verified packagesWhen a package passes release cycle testing for a specific version of Unity, it receives the Verified For designation. This means that these packages are guaranteed to work with the designated version of Unity.
    See in Glossary     and Preview packagesA preview package is in development and not yet ready for production. A package in preview might be at any stage of development, from the initial stages to near completion.
    See in Glossary
  • Learn how to build a custom package: Creating custom packages

Unity User Manual sections

Main.UnityOverview

Working in Unity

A complete introduction to the Unity Editor.

Main.Unity2D

Unity 2D

All of the Unity Editor’s 2D-specific features including gameplay, spritesA 2D graphic objects. If you are used to working in 3D, Sprites are essentially just standard textures but there are special techniques for combining and managing sprite textures for efficiency and convenience during development. More info
See in Glossary and physics.

Main.Graphics

Graphics

The visual aspects of the Unity Editor including camerasA component which creates an image of a particular viewpoint in your scene. The output is either drawn to the screen or captured as a texture. More info
See in Glossary and lighting.

Main.PhysicsSection

Physics

Simulation of 3D motion, mass, gravity and collisionsA collision occurs when the physics engine detects that the colliders of two GameObjects make contact or overlap, when at least one has a Rigidbody component and is in motion. More info
See in Glossary.

Main.UNet

Networking

How to implement Multiplayer and networking.

Main.ScriptingSection

Scripting

Programming your games by using scripting in the Unity Editor.

Main.Audio

Audio

Audio in the Unity Editor, including clips, sources, listeners, importing and sound settings.

Main.AnimationSection

Animation

Animation in the Unity Editor.

Main.UISystem

UI

User interface toolkits available in the Unity Editor.

Main.Navigation

Navigation

Navigation in the Unity Editor, including AI and pathfinding.

Main.Services

Unity services

Main.VROverview

Virtual reality

Main.ContributingToUnity

Contributing to Unity

Suggest modifications to some of the Unity Editor’s source code.

Main.PlatformSpecific

Platform specific

Information about the platforms that you can build your application for.

Main.LegacyTopics

Legacy topics

Useful if you are maintaining legacy projects.


Further sources of information

  • Unity Answers or Unity Forums - here you can ask questions and search answers.

  • The Unity Knowledge Base - a collection of answers to questions posed to Unity’s Support teams.

  • Tutorials - step by step video and written guides to using the Unity Editor.

  • Unity Ads Knowledge Base - a guide to including ads in your game.

  • Asset Store help - help on Asset StoreA growing library of free and commercial assets created by Unity and members of the community. Offers a wide variety of assets, from textures, models and animations to whole project examples, tutorials and Editor extensions. More info
    See in Glossary     content sharing.

Known issues

Is a feature not working as you expect it to? It might be an existing Known Issue. Please check using the Issue Tracker at issuetracker.unity3d.com.

Unity User Manual 2021.3 (LTS)
Unity User Manual 2021.3 (LTS)
Copyright © 2021 Unity Technologies. Publication Date: 2022-06-03.
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