How do you maintain character and visual consistency across a long AI filmmaking project with multiple scenes?

Lock consistency once, upstream, then route every shot through that lock. Build a treatment document and character sheets, load them into the invideo agent at project start so they persist across scenes, generate four reference options per character and environment and lock the picks before any video, then work act-by-act so the agent never loses context on a long project.

invideo is an agentic video tool that holds project context across scenes and routes each shot to the right model (Seedance 2.0, Veo, Kling, Recraft, Nano Banana, GPT-Image-2), so the consistency work you do once carries forward instead of being re-prompted every clip.

1. Load a treatment document once, at project start. Write a structured visual-language document — camera, lens, lighting, palette, composition, mood, atmosphere, negative prompts — and upload it to the invideo agent before generating anything. The agent reads it once and gates every subsequent shot against it, which is what stops style drift between scene 1 and scene 50. One documented 70-second short used a 25-page treatment with 12 key parameters per shot; the horror short ran a 9-step shot-design pass and 8-step color-grading pass off the same loaded doc. "Agent One reads your treatment doc once and keeps it loaded across every frame. The thread stays held, scene to scene. No re-explaining. No starting over."

2. Lock characters with sheets, not LoRA. Generate multi-angle character sheets (front, side, profile, back, plus face and mid close-ups) using Nano Banana or GPT-Image-2 at high resolution, generate four options per character, pick one, and lock it in the agent's context. Always include close-up panels — small details (scars, accessories, costume trim) drift first when only wide angles are referenced. One production locked two characters across an entire 70-second film with no fine-tuning; the Arcane-style episode locked four characters in 11 reference images at roughly 5 generations and ~$9.78 per character. If a character evolves (a costume change, a new prop per beat), build a separate sheet per beat rather than trying to make one sheet cover the arc.

3. Lock the world the same way. Generate four environment-reference options per location, pick one, and let the agent extract every angle (wide, close, side) from the locked plate instead of re-prompting per shot. After grid iteration, the selected panels REPLACE the original references — those extracted images become the continuity anchors all subsequent scene generation pulls from.

4. Attach the style block and references to every generation. Use the invideo agent in Always Ask mode so you approve each prompt before credits spend, and make sure character sheets + the style block ride along on every shot. Style blocks should include explicit negative constraints ("not live-action, not photorealistic, hand-painted brushstroke texture on every surface") — without them, models drift toward their training defaults.

5. Work act-by-act, not end-to-end. Long projects exhaust context. Complete storyboarding, generation, and a rough cut for one act fully before opening the next — "do 25%, 25%, and then move on" — so the agent stays oriented and you can re-anchor cleanly at each handoff. When you do need to re-sync mid-project, ask the agent for a status summary (what's approved, pending, awaiting regen), then re-inject the character spec and style block at the top of the new session before generating.

6. Fix continuity at the source, not the shot. When a continuity error appears (wrong earring, wrong jacket), don't re-roll the shot — ask the agent to inspect the character sheet, identify which panel contains the error, correct that panel, store the updated sheet in context, and regenerate only what's needed. Surgical edits, not slot-machine re-rolls. The fix propagates because every downstream shot inherits the corrected sheet automatically.

7. Run a typed crew so consistency is somebody's job. Spin up a creative producer agent first, loaded with the full script, shot breakdown, and character details — that's the central vision-holder. Then add a storyboard agent, a DOP agent (or several, one per scene's visual sensibility), a costume designer agent, a production designer agent. Each holds its slice of the consistency contract; the producer agent grounds them all in the same creative understanding. One production ran 6 agents in parallel; a brand promo ran 8 simultaneously across separate project pages so feedback to one agent didn't contaminate another.

8. Use the agent as a maker-checker on the rough cut. Send the assembled draft back with an open "what's working, what's not" prompt. The agent cross-references against the loaded treatment and catches drift a human editor misses — one production's entity-reveal shot was running at the wrong emotional stage register, which the agent flagged and the director hadn't noticed.

A realistic baseline: documented productions used these methods to ship 70-second to 7-minute films in 2–5 days at $750–$5,000, with consistency holding across 21+ scenes in a single project and scene numbering visible past #169.

Watch some of these to see what works for you:

Agent One reads your treatment doc once and keeps it loaded across every frame. The thread stays held, scene to scene. No re-explaining. No starting over.

— invideo's creative team