Unity Technical Notes

C# is the language that powers Unity games. This article explains the essential C# fundamentals every Unity beginner should know: variables, data types, functions, and control flow statements.

The Heart of Unity: GameObjects and Components Explained

Learn Unity's most fundamental concepts: the relationship between GameObjects and Components. Understand Unity's design philosophy of adding functionality to empty objects, explained for beginners.

Unity Lifecycle Complete Guide - Awake, Start, and Update Execution Order

Understanding when and in what order Unity scripts execute is crucial. Learn the roles and differences of key event functions like Awake, Start, and Update, explained for beginners.

Mastering Unity's Reuse System: Prefabs - Efficient Object Duplication and Management

Prefabs are among Unity's most important features for dramatically improving development efficiency. Learn everything from what Prefabs are, how to create and use them, to advanced topics like Nested Prefabs and Variants.

Unity Project Organization - Scene and Folder Structure Basics

File management techniques for avoiding chaos in large Unity projects. Learn the role of scenes and best practices for effective folder structures organizing scripts, materials, Prefabs, and more.

Unity Scripting Fundamentals: Understanding the MonoBehaviour Class

What is the MonoBehaviour class that appears in every Unity C# script? Learn its role and how to use convenient properties like transform and gameObject, explained for beginners.

Unity Debugging Fundamentals - Debug.Log and Error Handling

Bugs are friends, not enemies! Learn Unity's most fundamental debugging techniques: using Debug.Log, interpreting common error messages, and advanced debugging with the debugger.

Understanding Unity Event Functions - OnTrigger vs OnCollision

OnTriggerEnter and OnCollisionEnter both detect object contact. Learn when and how these event functions are called, their differences, and how to choose the right one for beginners.

Mastering Coroutines: Unity's Asynchronous Processing

Need to wait a few seconds before resuming? Want to split heavy processing across frames? Learn Unity's powerful Coroutine feature with IEnumerator and yield return explained for beginners.

Mastering Unity Input Handling - Keyboard, Mouse, and Gamepad

Input handling is fundamental for player control. Learn how to receive input from keyboards, mice, and gamepads—from Unity's traditional Input Manager to the new Input System package.

Proper Use of Update() vs FixedUpdate(): Mastering Unity's Frame Updates

Unity's two main update functions: Update and FixedUpdate. Learn the critical differences in execution timing and when to use each for game logic versus physics—with practical examples.

Mastering Unity Scene Transitions: SceneManager Guide

From title screen to gameplay, from gameplay to results. Scene transitions are essential for game flow. Learn scene management focused on the SceneManager class, explained for beginners.

Essential Component Communication: Mastering GetComponent in Unity

GetComponent is essential when you need to use another component's functionality. Learn everything from basic usage to retrieving components from child/parent objects and performance-conscious caching patterns.

Rendering Optimization: Understanding Draw Calls and Batching for Better Performance

Why does adding objects slow things down? The key lies in 'draw calls.' Learn what draw calls are and how Unity's powerful 'batching' techniques reduce them for faster rendering.

Dramatically Improve Unity Performance with Custom Update Managers

Is Update() call cost really negligible? Learn the advanced optimization technique 'Custom Update Manager' practiced by professional developers, with detailed code examples.

Why Unity Games Stutter: Understanding Garbage Collection (GC)

Garbage Collection is one of the biggest performance killers in Unity games. Learn why GC causes spikes, and master professional coding techniques to minimize GC with best practices from the industry.

Essential Optimization: Eliminating Instantiate and Destroy with Object Pooling

Object Pooling is an essential technique for dramatically improving game performance. Learn why Instantiate and Destroy are expensive, and how to implement a pooling system that reuses objects—with diagrams and code examples.

Unity UI Fundamentals: Understanding Canvas, RectTransform, and Anchors

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UI is essential for health bars and score displays. Learn the fundamentals of Unity's UI system (uGUI): Canvas, RectTransform, and the crucial 'Anchor' concept for maintaining layouts across different screen sizes.

Unity's Physics Core: Complete Guide to Rigidbody

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Rigidbody is the heart of physics simulation—applying gravity and enabling realistic collisions. Learn its role, how to move objects using AddForce and velocity, and essential properties.

Easy Data Saving in Unity: PlayerPrefs Usage and Considerations

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PlayerPrefs is a feature for saving simple data like volume settings and high scores. Learn basic usage (SetInt, GetInt), cases where you shouldn't use it, and the importance of encryption.

Setting Game Resolution and Fullscreen Mode in Unity

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Resolution settings let players customize their experience. Learn how to use the Screen class for dynamic resolution changes, fullscreen mode switching, and default build settings configuration.

Unity 2D Animation: Bringing Characters to Life with Animator

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2D animations bring characters to life. Learn how to create animation clips using the Animation window and control playback with Animator Controllers.

Unity 2D Physics: Rigidbody2D and Collider2D Basics

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Physics for realistic 2D game movement. Learn the core components of Unity's 2D physics engine (Box2D): Rigidbody2D and Collider2D types.

Unity 2D Development: Mastering Sprites and Sprite Sheets

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Sprites are the foundation of 2D game visuals. Learn about sprite sheets that combine multiple images into one, and how to efficiently slice them using the Sprite Editor.

Unity 3D Character Animation: Mastering Animator and State Machines

Bring 3D characters to life with Animator Controllers. Learn to manage states like idle, walk, run, and jump using state machines, and smoothly transition between animations using parameters.

Getting Started with Unity 3D: Mastering 3D Model Import Settings

The essentials for using 3D models from Blender or Maya in Unity. From FBX export tips to Unity's material, mesh, and rig settings—a comprehensive import guide.

Unity AI Navigation: Creating Smart Enemy Characters with NavMesh

Enemy characters that avoid obstacles while chasing players. Learn the fundamental technique for implementing smart AI movement—NavMesh (Navigation Mesh). Comprehensive coverage from baking NavMesh to configuring NavMesh Agent and script control.

Unity Lighting Fundamentals: Bringing Scenes to Life with Light and Shadow

Lighting determines the atmosphere and realism of 3D scenes. Learn the fundamentals of controlling light and shadow—from light types (Directional, Point, Spot) to realtime vs baked lighting and Global Illumination concepts.

Unity Materials and Shaders Basics: Adding Color and Texture to Objects

Essential knowledge for giving 3D models realistic surfaces—Materials and Shaders. Learn their relationship, how to use Unity's standard shaders (Lit/Unlit), and PBR (Physically Based Rendering) basics.

Unity Audio: Implementing BGM, Sound Effects, and 3D Sound

Sound enhances game immersion. Learn Unity's audio basics: playing BGM, triggering sound effects (SE) on button clicks or collisions, and using 3D spatial sound.

Unity C# Design Patterns: Decoupled Code with Events and Delegates

Overusing GetComponent and FindObjectOfType makes code complex and fragile. Learn to use C#'s powerful delegates and events to break object dependencies and design loosely coupled, extensible, reusable systems.

Unity Game Architecture: Understanding Game Loop and Game Manager Pattern

How do you manage overall game flow? Learn to implement the 'Game Manager' pattern for controlling game states (title, playing, game over) and centralizing critical data like scores and player status.

Unity Camera Revolution: Cinematic Camera Work with Cinemachine

No more hand-coded camera scripts. Unity's powerful Cinemachine package enables complex, smooth camera work for 2D and 3D with no coding—from basic follow cameras to multi-camera blending.

Unity Build Basics: Exporting Games for PC, Web, and Mobile

Building exports your game as executable applications others can play. Learn build methods for major platforms (PC, WebGL, iOS, Android) and important platform-specific settings.

Unity Design Pattern: Managing Complex AI and Character States with State Pattern

Escape nested if/switch hell. Learn to implement complex character states (idle, attack, defend, flee) as clean, extensible state machines using the classic 'State Pattern' design pattern.

Unity Large-Scale Development: Optimizing Asset Management with Addressables

As projects grow, memory management and build time issues become critical. The Addressable Asset System is the modern solution that goes beyond Resources folder limitations, enabling dynamic asset loading and unloading.

Unity Mobile Game Optimization Guide: Improving Performance and Battery Life

Mobile devices have stricter constraints on performance, heat, and battery compared to PCs. Learn essential optimization techniques for smooth mobile games: reducing draw calls, managing polygon counts, memory optimization, and touch input handling.

Unity Particle System Introduction: Creating Fire, Smoke, and Magic Effects

Visual effects (VFX) add life and excitement to games. Learn the basics of using Unity's built-in 'Shuriken' Particle System to manipulate countless small particles and create diverse effects like fire, smoke, sparks, and magical glows.

Unity Profiler Introduction: Discovering and Optimizing Performance Bottlenecks

Game running slow or stuttering? The Profiler is essential for identifying causes. Learn to visually analyze CPU usage, memory allocation, and rendering load to discover and optimize performance bottlenecks.

Unity Multiplayer Introduction: First Steps with Netcode for GameObjects

Fundamentals of online multiplayer game development. Learn basic concepts using Unity's official networking solution 'Netcode for GameObjects': object synchronization, client/server roles, and RPC (Remote Procedure Call).

Unity Save & Load: Persisting Game Data with JSON Serialization