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YM 2D Map Editor is designed for building 2D game maps. Import your terrain tiles and object assets, then create maps quickly using tools such as Brush, Fill, Select, and Eraser. The terrain system automatically chooses the correct tiles based on neighboring cells to produce natural, seamless transitions (4-corner auto-tiling workflow).

## Typical Workflow (Auto-tiling Focus)

- **Import terrain tiles** and pick a terrain type (grass/mud/road, etc.)

- Paint terrain with the **Brush Tool**: the editor automatically generates **edges, corners, and transitions** based on neighbors

- Use the **Fill Tool** to cover large areas quickly while keeping natural boundaries

- Fine-tune with **Eraser/Brush** for local edits; surrounding transitions update automatically

- Add props (decorations/interactables) and gameplay data (e.g., collision) on the appropriate layers

- Export the map primarily as **JSON** for integration into your game project

## Key Features

### Smart Terrain System

- **Auto-tiling**: seamless terrain transitions

- **Edge detection**: smart tile selection based on adjacent terrain

- **4-corner system**: more detailed terrain connections

### Multi-Layer Editing

- **3 Terrain Layers**: stack and edit complex landscapes

- **3 Object Layers**: organize props and decorations by layer

- **Collision/Shadow Layers**: paint gameplay collision and shadow data

### Professional Editing Tools

- **Brush**: adjustable brush size

- **Fill**: tight fill or random scatter options

- **Select**: select and manipulate objects

- **Eraser**: remove terrain and objects

### Export & Output

- **Map export**: primarily **JSON**

- **Minimap export**: customizable size and scale

- **Resource export**: package related resources with your project

### Efficiency & Reliability

- **Undo/Redo**: up to 50 steps

- **Auto backup**: up to 5 revisions

- **Dark/Light theme, Zoom & Pan**: smoother editing workflow

- **Multi-language**: Chinese / English

## Perfect For

- 2D developers making **RPG / Adventure / Strategy / Platformer** maps

- Indie teams prototyping and iterating level layouts quickly

- Developers who need exportable data for custom pipelines, Unity, Godot, etc. (universal export formats)