CozyClay

Block the shot before you pay to render it

Free, open source previs in your browser.

npx cozyclay --via site
Greybox left, generated right. Same camera, every cut.

How it works

1

Block the scene

Set pieces and characters.

2

Set the camera

Moves and cuts on a timeline.

3

Hand off the shot

Export the move, not a prompt.

Try it

    Loading the studio…
    Open studio ↗

    Needs a mouse and keyboard.

    What you can do

    Stage a scene

    Primitives, set pieces, plan view.

    Move through the set

    Fly, walk, orbit, frame.

    Author the camera

    Lens, dolly, crane, cuts.

    Generate motion

    Poses, Prompt Blocks, IK fixes.

    Quick start

    Node.js 22.13+ and a Chromium browser.

    Full control list
    npx cozyclay --via site
    Full control list
    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

    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.

    Block your first shot