Guides
AI 3D animation: how to animate an AI-generated model, step by step
AI generators make static meshes. How to rig, animate and export an AI-made 3D character, and how that differs from AI video tools.
2 min read
Quick answer
Can AI make 3D animation?
Partly. AI generators make static 3D models, and separate tools add movement. The usual chain is to generate a character mesh, give it a skeleton with an auto-rigger such as Mixamo, apply ready-made or motion-captured animations, then render or export to a game engine. AI video tools make moving pictures, not animated 3D files.
Two different things called "AI 3D animation"
- AI video that looks 3D. Video models generate a clip of a character moving. It's a video file: you can't change the camera, put it in a game or re-time it.
- An animated 3D model. A mesh with a skeleton and keyframes, as FBX or GLB. It plays in Blender, Unity, Unreal, Godot or on a web page, from any angle.
This guide is about the second. It takes a few tools, because no single model does every step well yet.
The pipeline
1. Generate the character in a neutral pose
Rigging is far easier from an A-pose or T-pose: arms away from the body, legs apart, hands open. Ask for it in your prompt or draw it that way. A-pose vs T-pose explains which to choose.
Generate the mesh in an AI 3D tool. Vi3W makes static meshes; it doesn't rig or animate, but it retopologises the mesh, which matters for the next step.
2. Check the topology
Joints bend by deforming the mesh around them. Dense, random triangles crease badly at elbows and knees. Topology for animation shows what to check before you rig.
3. Rig it
- Mixamo (Adobe, free with an Adobe account) auto-rigs a humanoid from an uploaded FBX or OBJ. Mixamo with an AI character.
- Blender's Rigify for more control, or for non-humanoids.
- Rigging an AI character covers both, and what to do when auto-rigging fails.
4. Add the motion
- Mixamo's library of walk, run, idle and attack clips is the fastest.
- Video-based motion capture tools turn a phone video of you into skeletal animation.
- Keyframing by hand in Blender for anything specific.
5. Export or render
Export FBX for Unity and Unreal, GLB for Godot and the web. Or render the animation in Blender.
What tends to go wrong
- Fused fingers. Generated hands are often one lump. Mixamo has a setting for fewer finger bones; or accept mitten hands for stylised characters.
- Baked-in pose. A character generated mid-stride is hard to rig. Start from a neutral pose.
- Clothing and hair. Long coats and loose hair deform with the legs or head unless they get their own bones.
Try it
Generate a character in Vi3W in an A-pose, export FBX, and take it to Mixamo.
Last reviewed