How to Import 3D Models into Unity (Using .glb, .fbx, and glTFast)

If you’re building a Unity project, you’ll almost always need 3D assets — characters, props, or environments.
Fortunately, Unity supports a wide range of formats like .fbx, .obj, and .glb.

This guide walks through the main methods for importing 3D models into Unity,
how to fix common issues, and a quick way to create your own .glb files with our service, Alchemetry3D, if you don’t already have one.

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Supported 3D File Formats in Unity

Format	Typical Use	Notes
.fbx	Industry standard for animation & rigged models	Works out of the box in Unity
.obj	Simple geometry models	No animation or material data
.glb / .gltf	Compact modern format for real-time apps	Requires an importer package (glTFast or UnityGLTF)
.blend	Direct Blender files	Unity converts them internally if Blender is installed

💡 Tip: .glb (binary GLTF) is becoming increasingly popular because it’s lightweight, stores textures in one file, and loads fast — perfect for mobile or web builds.

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Step 1: Open Package Manager

To begin, open the Package Manager in Unity. This is where you'll find and install additional tools and assets.

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Step 2: Add glTFast Package by Name

In the Package Manager, click the + button located at the top-left corner. Select "Add package by name..." from the dropdown menu.

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Step 3: Install glTFast

Enter com.unity.gltfast into the input field and click "Add". The package will download and install, which should complete after a few seconds.

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Step 4: Drag & Drop Your GLB Model

Once glTFast is installed, you can now drag and drop your .glb model directly into your Unity project's Assets folder.

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Step 5: Model Imported!

The model will be imported into your scene, ready for use. You can now adjust its position, scale, and materials as needed.

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🧩 Need a 3D Model But Don’t Have One Yet?

If you don’t have a .glb or .fbx file handy — or just want to prototype faster — you can generate one automatically using AI.

Tools like Alchemetry3D let you:

• Upload a simple 2D image (sketch, concept art, photo)
• Get a downloadable .glb model in about 20 seconds
• Import it directly into Unity using glTFast

It’s a great option for indie devs or small teams who want quick placeholders before hiring artists or buying assets.

Instead of spending hours modeling or searching through asset stores,
you can go from idea → model → Unity scene in under a minute.

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Final Thoughts

Importing 3D models into Unity is straightforward once you know the right formats and tools.
Whether you’re importing from Blender or downloading .glb files from the web, Unity handles them easily with the glTFast package.

And if you need a model fast, AI-powered generators like Alchemetry3D can bridge the gap — helping you visualize, test, and iterate your game ideas in record time.

Start experimenting today: Alchemetry3D → Upload your 2D image and get a 3D model

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Written by the Alchemetry3D Team — making game asset creation faster, simpler, and accessible to everyone.