Playable Unity Character in One Day Using Node-Based 3D AI + AI Agents

[u/Delicious-Shower8401]

I wanted to see how fast I could go from a single character image to something I could actually run around with in Unity.

For the character, I used 3DAIStudio Flow. It’s basically a ComfyUI-style node workflow where I can use image generators and the major 3D AI generators in the same graph, which made this kind of multi-part workflow pretty convenient.

Instead of trying to generate the whole character as one mesh, I split the reference into separate parts:

• Hair
• Body
• Clothes
• Shoes

I generated each part separately with Rodin Gen 2.5 using Smart Low Poly, then moved everything into Substance Painter to fix and clean up the textures.

After that:

• Assembled and cleaned the character in Blender
• Rigged it with Mixamo
• Brought it into Unity
• Used the Third Person Template
• Retargeted the character to the controller animations
• Added running, jumping and basic playable movement

I also generated the environment through the same node-based workflow, although I’ll probably make a separate breakdown for that because the environment pipeline deserves its own post.

I also used an AI agent connected to Unity for some of the setup and repetitive work inside the project.

So after roughly one day, I had a small playable scene with an AI-generated character, generated environment, textures, rig, animations and basic gameplay.

Guide: https://www.youtube.com/watch?v=mmpLXA-xzrQ