Hi Product Hunt — I’m building Reelpen to give creators more control over a shot before sending it to an AI video generator. Build an editable 3D scene in your browser, plan character movement, direct a camera and export references. You can work visually or connect a compatible AI assistant through MCP. Try this: add a walking character, set a following camera, preview the entire shot, then export a reference video. MCP setup and troubleshooting: https://beta.reelpen.ai/guides/c... Examples and FAQ: https://github.com/viscountsparr... Reelpen is in free beta. Your AI assistant and external video generator have separate access rules and charges. Live scene access requires permission in the editor; saved-project and film-board permissions are separate. Builder coverage is evolving, and motion/framing should be reviewed before export. I’d love to hear which shot is hardest for you to control today — and whether the MCP connection steps are clear.

Reelpen

Build 3D scenes for AI video, by hand or through MCP

Build 3D scenes for AI video, by hand or through MCP