How to Keep AI Characters Consistent Across Images and Video
Consistency improves when you separate permanent identity from temporary scene details. Define the character once, reuse stable anchors, and change only pose, expression, camera, action, and environment at the shot level.
What you’ll take away
- Create one master identity block and stop rewriting it from memory.
- Keep permanent traits separate from wardrobe, pose, emotion, and scene instructions.
- Use reference images or model-specific consistency features when available.
- Reject visually attractive shots that break continuity.
Separate identity from scene direction
The most reliable character workflow starts with two layers. The identity layer contains traits that should almost never change: approximate age, face shape, hair, eye color, body proportions, signature clothing elements, and distinctive accessories. The scene layer contains everything that is allowed to change: expression, pose, lighting, camera angle, background, action, and temporary wardrobe details.
When both layers are rewritten from scratch in every prompt, small language differences can create large visual drift. Store the identity block in one place and reuse it exactly. Then append the shot instructions beneath it.
Identity block
Young adult woman, oval face, short black bob with blunt bangs, warm brown eyes, small silver star earring in left ear, teal windbreaker with white zipper, compact athletic build. Preserve facial proportions, hairstyle, earring placement, and jacket design.
Build a reference sheet before making scenes
Generate a neutral reference set before asking for dramatic shots. Useful views include front, three-quarter, profile, full body, and two controlled expressions. Keep the background simple so the model is not learning accidental scene details as part of the character.
Pick one approved version as the canonical reference. If your image or video model supports reference images, character references, identity strength, seeds, or similar controls, use the same approved asset consistently. The exact control names vary by model, so treat the reference sheet as portable creative documentation rather than a feature tied to one vendor.
Change one creative layer at a time
Lock identity
Keep the master character description and reference image stable.
Set the shot
Choose framing and lens language before adding action: close-up, medium, full body, overhead, low angle, or over-the-shoulder.
Add one action
Use a clear physical action with a readable start and end. Complex multi-step actions often create anatomy or continuity problems.
Add environment and light
Describe location, time of day, major light direction, and the few props that matter to the story.
Use a continuity checklist, not your memory
- Face: same proportions, eye color, nose, jaw, and age cues.
- Hair: same cut, length, texture, part, and color unless the story changes it.
- Signature details: earrings, glasses, scars, logos, or props remain on the correct side.
- Wardrobe: colors, closures, sleeves, shoes, and accessories match adjacent shots.
- Scale: character height and prop size remain believable across camera angles.
- Environment: doors, windows, major furniture, vehicles, and weather do not teleport between cuts.
Continuity beats isolated beauty
A slightly less impressive frame that matches the surrounding shots is usually more useful than a beautiful frame that makes the character look like a different person.
Hand off to video with motion instructions, not a new character prompt
When animating a still, the image already carries identity. The video prompt should focus on what changes over time: subject motion, camera motion, environmental motion, timing, and what must remain fixed. Re-describing the entire character can invite the model to reinterpret features that were already correct.
For multi-shot sequences, write a short continuity note between shots: “same jacket, same wet street, camera moves from medium profile to rear tracking shot.” This gives you a practical edit target even when individual generations vary.