Instant Mesh vs Hunyuan vs Meshy.ai: Comparison of 2D to 3D AI Tools

How to Turn 2D Images Into 3D Models for Free:

Have you ever dreamed of turning your 2D art or images into 3D models — without needing expensive software or expert skills? In this post, I’m going to show you three completely free ways you can do exactly that using AI tools.
And by the end, we’ll compare them side-by-side so you know which one is best for your needs.

Step 1: Generating a 2D Image to Use

First, we need a good reference image.
For this, I used Leonardo.Ai, a free platform that gives you around 150 credits per day. It’s great because it connects different AI models behind the scenes.

I wanted to create a sci-fi gun with blue and red accent lights. After typing the prompt, Leonardo generated some initial images, but I wanted even better results.
So, I copied the prompt and enhanced it using another AI (you can use tools like ChatGPT, DeepSeek, or any free text enhancer).
After tweaking the prompt a bit more (changing it to white metallic colors), I finally got the design I wanted and downloaded it.

Now, it’s time to turn it into a 3D model!


Step 2: Converting 2D Image Into 3D Model (Three AI Tools)


1. Instant Mesh (Hugging Face)

  • How it Works:
    Upload your image ➔ Removes background ➔ Generates multiple angles ➔ Creates a 3D model using photogrammetry.
  • Results:
    The model generated was basic. Background removal sometimes had issues. The output mesh lacked fine detail and was rough. No textures were automatically mapped.
  • Pros:
    • Completely free and open-source.
    • Very fast generation.
  • Cons:
    • Low model quality.
    • No textures.
    • Not very usable unless you manually clean it up in Blender or another 3D tool.

2. Hunyuan 3D-2 (Hugging Face)

  • How it Works:
    Upload your image ➔ Removes background ➔ Generates shape and texture together.
  • Results:
    A massive improvement over Instant Mesh!
    The mesh had good detail and the object was textured properly. You could view it from any angle and the geometry was cleaner.
  • Pros:
    • High-quality models with textures.
    • Good detail for props and weapons.
    • Free to use through Hugging Face spaces.
  • Cons:
    • Some slight mesh topology issues.
    • You might need to remesh if you’re making it game-ready.

3. Meshy.ai

  • How it Works:
    Sign up for a free account ➔ Upload your image ➔ Generates four different 3D options ➔ You select the best one ➔ Fine-tune if needed.
  • Results:
    Meshy stood out for its user interface and options.
    You can select quad-only topology (better for clean modeling), optimize polygon count, and even edit the textures using simple prompts!
    If you’re working with humanoid characters (humans, pets), Meshy even lets you auto-rig and apply animations.
  • Pros:
    • User-friendly UI.
    • Quad topology option.
    • Built-in texture editing and material maps.
    • Auto-rigging available for characters.
  • Cons:
    • Limited free credits (although manageable for casual use).
    • Slightly less fine detail compared to Hunyuan 3D2.

Step 3: Final Testing in Blender

After importing the three models into Blender:

  • Instant Mesh model:
    Almost unusable without major cleanup. No textures.
  • Hunyuan 3D2 model:
    Excellent detailing, usable directly in projects. Good textures, but topology might need optimization if needed for professional use.
  • Meshy.ai model:
    Best overall for topology (quad-based), built-in texturing, and ease of use. It even included additional maps (normal, roughness, etc.) if you need them.

Final Comparison

FeatureInstant MeshHunyuan 3D2Meshy.ai
CostFreeFreeFree (limited credits)
Model DetailLowHighGood (slightly less detailed)
Texture QualityNoneHighGood with edit options
Topology QualityPoorGood but needs cleanupVery good (quad-based)
UI/UXBasicBasicExcellent
Rigging SupportNoNoYes (auto-rigging)
Best ForExperimentationGame assets, VR assetsCharacters, concept art, animation

Recommendation

  • If you want the highest-quality model and don’t mind some mesh cleanup:
    ➔ Use Hunyuan 3D2.
  • If you want flexibility, clean topology, texture editing, and animation support:
    ➔ Use Meshy.ai.
  • If you are just experimenting or prototyping for fun:
    ➔ Try Instant Mesh, but expect to do a lot of manual cleanup.

Conclusion

AI tools have made it easier than ever to generate 3D models from just a 2D image — completely free!
While none of them are 100% perfect, depending on your project needs, you can get game-ready or animation-ready assets without learning complex 3D software from scratch.

If you liked this breakdown, check out my upcoming post where I show how to optimize these models inside Blender to make them even better!

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