Building a Browser MMD Studio with Three.js

MikuMikuDance still lives mostly on the desktop: PMX models, VMD motion, skirt physics, camera work. We built AnimaStage Lite — an open-source browser studio so you can load assets, preview motion, add FX, and export vertical Shorts without installing MMD. 🔗 Repository: https://github.com/FBNonaMe/animastage-lite 🌐 Live demo: https://animastage-lite.app/ 🎬 Open the studio: https://animastage-lite.app/app Why the browser? Short-form creators need: 9:16 framing and 1080×1920 export Fast PMX + VMD iteration Stable WebGL on everyday laptops AnimaStage Lite is not a full MMD clone — it’s a focused stage : load, animate, light, record. Stack Layer Tech UI React 19 + TypeScript 3D Three.js + React Three Fiber Build Vite 6 Physics Bullet (Ammo.js) HQ video WebCodecs + mp4-muxer Live video MediaRecorder All core features run client-side . What it does Drag & drop PMX/PMD, VMD, textures, HDR Timeline + dopesheet + Bézier curves + VMD export Bullet physics — skirt, hair, accessories RTX Lite — bloom, DOF, weather, style presets MP4 HQ (frame-by-frame) and Live recording Clean capture — no gizmos in the final video 9:16 Lite — lighter render path to reduce WebGL context loss Optional: MediaPipe mocap, Gemini AI keys, Local/WebRTC collab. Try it Online: https://animastage-lite.app/app — drop your PMX + VMD. Locally: bash git clone https://github.com/FBNonaMe/animastage-lite.git cd animastage-lite npm install npm run dev https://animastage-lite.app/ — landing http://localhost:3000/app — studio (local) Optional AI: copy .env.example → .env and set VITE_GEMINI_API_KEY. Open source Star ⭐ the repo, open issues, send PRs: https://github.com/FBNonaMe/animastage-lite MMD models are not bundled — use only content you have rights to publish. What would you use this for — Shorts, VTuber previews, or learning Three.js? Comments welcome. ---