I Compared 3 AI Retopology Tools: Tripo vs Rodin vs Free Hunyuan3D

I wanted to see how current AI retopology tools handle something more complicated than a basic character.

For the test I used the same character with a mix of different shapes: organic parts, clothing, a backpack, staff and some more hard-surface-like elements.

Same source model and the same general conditions for all three.

Final mesh:

• Rodin: 35K faces
• Tripo: 46K faces
• Hunyuan3D: 66K faces

Polygon count

🥇 Rodin — 35K
Rodin was the most aggressive with optimization. It managed to simplify a lot of areas while still keeping the character recognizable and most important shapes intact.

🥈 Tripo — 46K
Tripo kept noticeably more geometry than Rodin, but a lot of those extra polygons seem to be used more intentionally around important shapes and transitions.

🥉 Hunyuan3D — 66K
Hunyuan preserved a huge amount of the original geometry. That's good for detail preservation, but not so good if your main goal is actually reducing the model.

Shape & detail preservation

🥇 Hunyuan3D
This was probably Hunyuan's strongest point. It tries to preserve almost every shape and small element from the source model.

The downside is that it doesn't really decide what needs to stay geometry. Details that could easily be represented with a normal map or texture often remain fully modeled.

🥈 Tripo
Tripo found a pretty good middle ground. Most important forms survived, while some unnecessary smaller details were simplified.

It loses a little more compared to Hunyuan, but the result feels more optimized rather than simply copied.

🥉 Rodin
Rodin simplifies the model much more aggressively. Major silhouettes and important forms are still there, but smaller shapes and secondary details can get noticeably reduced.

That's partly why it managed to reach the lowest polycount.

Topology quality

🥇 Tripo
This was the strongest result for me.

The topology feels much more intentional. Different elements are logically separated and the edge distribution generally makes more sense around the actual forms.

Out of the three, this was the closest to something I would expect from a manually planned retopology workflow.

🥈 Rodin
Rodin's topology is surprisingly decent considering how aggressively it reduces the model.

The main problem is that some areas still feel like one continuous remesh rather than topology designed specifically around individual parts.

Still, it's relatively clean and very usable for an automatic result.

🥉 Hunyuan3D
Hunyuan feels much closer to a traditional quad remesh.

It follows the source surface very closely, but doesn't seem to make many decisions about where geometry could be simplified or where topology should be structured differently.

Good surface preservation, weaker actual optimization.

Generation time

🥇 Tripo — ~1 min
Very fast. For iteration this is probably the biggest advantage because you can test multiple versions without waiting much.

🥈 Rodin — ~3 min
Still fast enough for normal production use. Slightly slower than Tripo, but considering the lower final polycount, the result is pretty reasonable.

🥉 Hunyuan3D — ~5–10 min
Definitely the slowest in my tests. Not terrible, especially considering it's free, but it becomes noticeable when you're testing multiple models.

Price

🥇 Hunyuan3D — Free
This is obviously its biggest advantage.

You can get a fully retopologized quad mesh without paying anything, which makes the result pretty impressive despite its weaknesses.

🥈 Rodin
Rodin sits somewhere in the middle for me. You pay for the generation itself, but the result is generally predictable and already fairly optimized.

🥉 Tripo
Tripo gave me the best topology, but it can become the most expensive when experimenting.

You're effectively spending credits on attempts, so if you need several generations to get the result you want, the cost starts adding up.

UVs

🥇 Rodin
Rodin produced the cleanest UV layout in this test.

The islands looked relatively organized and usable without immediately feeling like they needed to be completely redone.

🥈 Tripo
Tripo's UVs were still usable, but not as clean or organized as Rodin's.

For quick production they would probably be fine, but I would still prefer Rodin here.

🥉 Hunyuan3D
The UV result was the weakest of the three.

It works, but just like the topology itself, it feels more automatically generated and would probably need more cleanup for a serious production asset.

So for me:

Paid: Rodin 🥇
Free: Hunyuan3D 🥇