Extending the Unity Editor with Custom Tools - Crash Course

Name: Extending the Unity Editor with Custom Tools - Crash Course
Rating: 4.6 (18 reviews)

A practical course on making your own Unity Editor Tools

Last updated 9/2025

English

English [Auto],

What you'll learn

5 sections • 14 lectures • 1h 38m total length

The Game Plan4:26
Brainstorms a Unity editor tool to customize folder color and icon via right-click, with a color list and custom icon menu, saving data with editor prefs and a json file.

The First Menu Item5:24
Create your first Unity editor tool with a menu item under assets/mineral/blue that colors the folder blue, implemented as a static editor script.
Adding more Menu Items5:06
Add more menu items to the Unity editor, arrange them with explicit priorities and separators for folders, and implement validate logic for folder-only changes with custom and reset icons.
We only want Folders5:01
Enable editor menu items only when a folder is selected by implementing a validate method that checks the selected object's path with the asset database.

Red Rectangles everywhere6:22
Learn to modify the Unity editor using editor scripts to repaint project window items, drawing red rectangles and custom icons with the item rect.
How to know which column we are in ?7:08
Determine whether a folder sits in the left or right column of the Unity editor grid by analyzing the selection rect, active object grid, and asset paths.
The Folder Rect7:31
Refine the folder icon in Unity by distinguishing left and right columns, adjusting rects and colors, and iterating with the editor grid to fit the target size.
First Colored Folder5:59
Replace the folder icon by creating an icons folder and drawing the texture with GUI.drawTexture in Unity. Load assets via the asset database and apply color logic for selected folders.
Saving the Folder State10:17
Extend the Unity editor by using menu items to color folders and save their icon and folder GUID states, leveraging asset database, editor prefs, and project window repaint logic.
Resetting the Folder Texture2:03
Reset and customize folder icons in the Unity editor by editing editor preferences and deleting the selected folder key, with optional toast confirmation and colored icons.
Picking a Custom Folder Texture12:48
Learn to create a Unity editor tool that assigns custom sprite icons to folders using an object picker, save mappings with editor prefs, and ensure persistence across sessions.

This might be the most practical course on making a Unity Editor Extension you’ve seen.

Yeah this is also kinda niche right ?

But ! I’m glad this is something new to you cause this might totally change how you work.

In this course, I’m going to show you how I created Mineral, a Unity Extension that allow you to customize your folders.

After finishing this course, you will be able to colorize your folders, and also replace their icons.

That’s not it, the method I’ll show you will unlock a whole world of possibilities as you will learn how to deal with:

Unity does come with a plethora of functions that allow you to extend the editor.

You will learn techniques that will drastically improve your workflow & help you create your own Unity Tools.

The only limit will be your imagination.

Do you feel that is something that will help you be a better dev ?

Something that can help you save time ?

If that's the case, Jump aboard, and Let's Begin!