MM Level Design Toolkit

MM Level Design Toolkit is a lightweight Unity Editor toolkit built to speed up scene building, object placement, hierarchy management, and everyday level design workflows.

Work directly from the Scene View with fast access to creation tools, geometry snapping, favorites, modifiers, randomization, replacement, and placement utilities.

🔗 Online Documentation

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⚡ WHY MM?

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MM helps you move faster inside Unity by reducing repetitive editor work and giving you quick access to the tools you use most.

Whether you are building environments, placing props, organizing hierarchies, or iterating on scene layouts, MM keeps the workflow simple and fast.

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⭐ KEY FEATURES

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⚡ Quick Actions

Open the main MM menu with Shift + A and quickly access creation tools, GameObject actions, Cursor tools, Modifiers, and Favorites.

🎯 Geometry Cursor & Snapping

Place the MM Cursor directly on vertices, edges, and faces.

Use multi-selection and A → B / B → A snapping to align objects precisely.

🧩 Favorites

Save frequently used prefabs, materials, folders, and tools.

Prefab and material favorites use visual thumbnails in a responsive grid.

🎲 Randomizer

Randomize Position, Rotation, and Scale with independent XYZ axis controls.

Supports Selection or Children targets, Global/Local position and rotation, deterministic seeds, live preview, Apply, Cancel, and Undo.

🔁 Replacer

Replace selected objects or direct children with prefabs or scene objects.

Supports Manual and Random percentage workflows while preserving hierarchy and transform placement.

📚 Array

Create repeated object arrangements with interactive Count, Gap, and Axis controls.

🪞 Mirror

Mirror objects across X, Y, or Z using Target, Cursor, or World origins.

⬇ To Floor

Drop selected objects onto the surface below.

Supports Unity Terrain, mesh/collider surfaces, elevated platforms, and multi-point sampling for uneven terrain.

🗂 Hierarchy Tools

Group selected objects, move objects between groups, create parents and children, navigate hierarchy selections, and quickly toggle GameObject active states.

🔎 Project Filter

Compact Project Browser filtering while keeping Unity's normal search workflow available.

📁 Project Group

Organize selected assets and folders directly from the Project Browser.

Press M while the Project Browser is focused to:

• Create a new folder and move the current selection into it

• Move selected assets or folders to an existing folder

• Search Project folders by name or path

• Save frequently used destination folders through drag and drop

Asset moves preserve GUIDs and existing references by using Unity’s Asset Database workflow.

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⌨ SHORTCUTS

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Shift + A — MM Quick Actions

Shift + S — Cursor Pie Menu

M — Move to Group in the Scene View or Hierarchy

M — Group Project Assets in the Project Browser

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✅ COMPATIBILITY

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• Editor-only tool

• Tested with Unity 6000.3.11f1

• No URP or HDRP requirement

• Global Volume action is shown only when Unity's Volume system is available

• No third-party commercial dependencies

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📝 NOTES

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• Randomizer Rotation applies the specified positive or negative delta on each enabled axis. For example, 180° produces either +180° or −180°, rather than an intermediate angle.

• To Floor performs vertical placement only and does not rotate objects to match surface normals.

• Project Group moves assets without changing their GUIDs, helping existing scenes, prefabs, materials, and script references remain intact.