Frames, sheets and keyframes

An image file has no single job. The connection and selected model mode determine whether it describes a subject, starts a clip or guides a sequence of shots.

Image use	What it supplies	What it does not establish
Character or object sheet	Several views and details of a reusable subject, usually held by an Element.	The composition of a finished scene.
First frame	The opening composition from which a clip begins.	The full path of the action or its ending.
Final frame	A desired endpoint on a route that accepts one.	Every event between the endpoints.
Storyboard sheet	One image containing ordered panels for a scene.	A precise timestamp for each panel.
Timed keyframes	Separate images at specified moments on a supported route.	Guaranteed motion quality between those moments.

An Element is not a first frame

An Element (Элемент) stores the subject’s identity and context. Its portrait or design sheet helps the model recognize that subject. First make or choose a composed scene image if the video should open in a particular location and pose.

Connect that finished image to first frame (первый кадр). If you instead connect a multi-view character sheet there, the opening image is the sheet itself. The model has not been told to convert it into a finished scene merely because it contains the right character.

A storyboard sheet is one reference image

For a supported sheet route, supply one finished image with the panels in order. Connecting several separate pictures does not automatically assemble them into a storyboard sheet.

In the Shoot from frames role, models that use references can receive the sheet through an Element input. The sheet guides the sequence, but its panels have no individually pinned times. On the Kling sheet route, provide the separate required first frame too; the sheet uses an Element slot.

FLUX 3 uses timed keyframes for this role instead. Its keyframe route does not read a storyboard sheet as a reference. Feeding the sheet as its first frame would animate that composite image.

Choose a route before preparing the images

Choose the model and mode, check its input limits, and decide whether you need endpoints, a sheet or timed frames. Review the selector’s method explanation, especially options with a caveat.

Expanding scenes from Prompt Scriptwriter prepares an appropriate image/video branch. It creates the graph; it does not generate the sheet, frame or clip. Inspect the branch and its intermediate image before approving video generation.

For a first exercise, use one composed image and a simple motion. Move to sheets or timed keyframes when the scene needs several visual commitments. See your first video and a consistent character.

Last checked: 14 October 2026. Input support is a property of the selected route; visual compliance must be checked in the generated clip.