CozyClay
CozyClay

Block the shot before you pay to render it

Free, open source previs in your browser. Block the scene, pose the characters, set the camera, then hand that exact shot to an AI video model.

Greybox left of the wipe, generated result right. Same camera, every cut.

Top: blocked here. Bottom: Seedance 2.5, same camera. the post ↗

Try it in your browser View on GitHub

Or run it on your machine: npx cozyclay. No Blender, no Unity. Open a saved .cclayproject from the first dialog.

Try it

The city block from the reels, live. Seven moves: fly the camera, cut a shot, draw its dolly, play it back.

    Loading the studio…
    Open studio ↗

    What you can do

    Stage a scene

    Primitives, set pieces, a W/E/R gizmo, and a plan view for character paths.

    Edit like Unity

    Right-drag flies, WASD walks, Alt-drag orbits, F frames. Muscle memory carries over.

    Author the camera

    Lens, dolly, crane, cuts on a timeline. Export the move, not a prompt.

    Generate motion

    Pose characters, sequence Prompt Blocks, play generated motion back with IK fixes.

    Quick start

    Node.js 22.13+ and a Chromium browser.

    npx cozyclay

    Or from source:

    git clone https://github.com/NomaDamas/CozyClay.git
cd CozyClay
npm install
npm run dev
    Full control list (Unity conventions)
    InputAction
    Right-dragLook around (fly)
    RMB + WASDWalk while flying
    RMB + Q/ECrane down / up
    Middle-dragPan
    Alt + dragOrbit the selection
    ScrollDolly
    W / E / RMove / rotate / scale tool
    Ctrl/Cmd+Z, Ctrl/Cmd+Shift+ZUndo / redo
    Ctrl/Cmd+DDuplicate the selection
    FFrame the selection

    Read

    Greybox to AI videoWhy a grey blockout is the input models keep Seedance 2.5 camera controlReference clip beats camera prompts Previs software comparedFree, open source, browser Camera control for AI videoWhy prompts drift

    FAQ

    What is CozyClay?

    Open source previs software in a browser: block a scene, pose characters, author camera moves and cuts, preview motion.

    Previs or previz?

    Same thing. Previsualization: the rough 3D pass where a shot gets blocked before anyone pays for final assets or renders.

    Can I use it for camera control in AI video?

    That is why it exists. Block the shot in 3D, then hand the camera move to the video model instead of describing it in a prompt. See camera control for AI video.

    Do I need Blender or Unity?

    No. It runs in a Chromium browser. Controls follow Unity conventions, nothing to install.

    Is it free? Does it phone home?

    Free, AGPL-3.0, runs on your machine and works offline. Project content is never uploaded. The npm package sends anonymous usage metrics; cclay telemetry off disables them.