PoPo

AI-powered MMD pose generator - Transform natural language into expressive 3D character animations

PoPo uses LLMs to generate MMD character poses from natural language descriptions. Instead of raw rotation quaternions, we use MPL (MMD Pose Language) - a semantic, MMD-specific pose description language that helps AI understand and generate anatomically correct poses.

🌐 Live demo: popo.love

Powered by Reze Engine

✨ Features

• Natural Language Input: "wave right hand with big laugh, inviting me for dinner"
• LLM-Generated Poses: Output semantic MPL code for precise pose control
• Real-time Rendering: Instant pose creation with smooth bone animations
• MMD-Specific: Built for anime characters with proper bone constraints and physics

🎯 LLMs with MPL

PoPo fine-tunes LLMs with MPL: MPL is a semantic pose description language designed specifically for MMD. This approach provides:

• Better training convergence - Structured, human-readable pose descriptions
• Consistent outputs - Same prompt generates reliable pose code
• Anatomically correct - Built-in constraints prevent impossible movements
• Debuggable results - Generated MPL code can be read and modified

🛠️ Technology

• Frontend: Next.js, shadcn/ui, TypeScript
• 3D Engine: Reze Engine
• Pose Language: MPL (MMD Pose Language) for semantic pose description
• AI Model: GPT-4o-mini for natural language → MPL generation
• Deployment: Vercel

🎭 Evolution

• MiKaPo: Camera → MediaPipe → MMD bones (real-time capture)
• PoPo: Text → Fine-tuned LLM → MPL code → MMD bones (AI-generated poses)

By using semantic MPL as the training target instead of raw quaternions, we achieve better consistency and allow the AI to learn the "grammar" of human movement.

📄 License

GPL-3.0 License - see LICENSE for details.