A scene builder for AI video helps you make placement, movement and framing visible before generation. In Reelpen, you arrange a simple 3D scene and export a reference. Your chosen AI video service supplies the final appearance.
Let AI build the first draft; you direct the details
Connect a compatible assistant using the Reelpen MCP setup guide, open your project and allow access to the intended scene. Ask for a small, editable draft with one action and one camera. You can switch between asking the assistant for changes and editing the scene by hand.
Build a simple street scene with one walking character. Place a camera beside the route to follow the character. Use simple reference objects. Show me a preview, and leave the scene editable so I can adjust the camera angle and timing.
This is an example request, not a guaranteed one-prompt result. Review what your assistant actually created. Use the camera preview to judge framing, play the action to check timing, and correct the scene before exporting. The assistant and the final video generator are separate services.
1. Start with a small scene
Sign in and open a blank project, or try the Follow example. Use Add to choose a Dolly character, a vehicle or an environment object. New models appear at the scene center. Position the first object before adding more, so overlapping objects stay easy to select.
2. Give the character a route
Select your character and choose Move. Click the ground to draw a path, then press Escape to finish. Drag the plus marker on a segment to add a bend. The 2D Plan view makes route editing easier to see.
Under Motion, choose Walking or Running and set the matching speed in metres per second. Play the scene to check how far the character travels. Speed, route length and duration all affect the result; making the path longer does not automatically make a walking character faster.
3. Frame the shot
Choose the camera in the scene list, or add a camera from the top of the Add panel. Use the outside view to position it and the camera preview to judge the image. Look sets a target independently of movement, so the camera can keep a character in frame while moving along its own route.
4. Preview, save and export
Play from the beginning and check the full shot. Account projects autosave; wait for Saved before leaving. Open Capture or Package for the available video and PNG outputs. Video formats depend on your browser.
Bring the reference into a video model that accepts that input type. Describe the desired appearance and atmosphere in your prompt. The model's support for references determines how closely the result follows your scene.