From Static Mesh to Motion-Ready Models

Turn any static 3D character into an

animation-ready asset in seconds

Start Rigging Free → Explore All Features

Built for Animation Pipelines

Neural4D's AI auto-rigging delivers clean skeletal hierarchies and smooth skin weights. No manual weight painting required.

Automatic bipedal and quadruped skeleton detection

Automatic Skeleton Detection

Intelligently finds the right joints and bones for humanoid, animal, and stylized characters. Instantly generates a clean hierarchy.

AI-Driven Skin Weights

Our algorithm ensures natural movement and accurate deformation. Prevent twisted limbs and mesh tearing without tedious manual weight painting.

Universal Engine Export

Export to six universal formats: `.FBX`, `.GLB`, `.OBJ`, `.USDZ`, `.STL`, and `.BLEND`. Pre-configured for Unity, Unreal Engine, and Blender workflows.

Why Rigging Matters for Animation

Manual Rigging vs. Neural4D AI Rigging

Manual skinning often leads to twisted joints, overlapping geometry, and hours of tedious weight painting. Neural4D utilizes true AI inference to output logically sound, clean skeletal hierarchies with perfectly smooth deformation that game engines can process instantly.

Comparison showing broken manual rig vs perfect smooth bending AI character rig

Seamless Integration for Every Pipeline

Indie Game Development

Instantly rig humanoid and creature meshes. Export directly to .fbx and drop assets straight into Unity's Mecanim or Unreal Engine's retargeting system for immediate gameplay testing.

VTuber & VR Avatars

Turn static 3D models into fully rigged avatars. The accurate skeleton hierarchy supports VR tracking and face capture out of the box for platforms like VRChat.

Cinematic Animation

Accelerate your pre-vis workflow. Export to .blend format and immediately start blocking out scenes in Blender without waiting days for a technical artist to finish rigging.

Mixamo Integration

Upload your AI-generated rig directly to Mixamo. Our standard bone naming conventions ensure flawless compatibility with Mixamo's extensive library of motion-capture animations.

Rig Your 3D Models Now →

Frequently Asked Questions

Does Auto-Rigging support all 3D models?

Yes, Neural4D's auto-rigging supports bipedal (humanoid), quadruped (animal), and stylized character models. It intelligently detects joint placements based on the mesh topology.

What export formats do you provide?

Neural4D supports six universal export formats: .FBX, .GLB, .OBJ, .USDZ, .STL, and .BLEND. For fully rigged and animated characters, we highly recommend exporting in .FBX or .GLB for seamless integration with Unity, Unreal Engine, and Blender.

Do I need to manually paint skin weights?

No. Neural4D uses AI-driven skinning to automatically compute smooth skin weights, preventing mesh tearing and twisted joints out of the box.

Is the rigged character compatible with Mixamo?

Yes, the exported .FBX rig utilizes standard skeletal hierarchies perfectly compatible with Mixamo, Unity Mecanim, and Unreal Engine's retargeting system.