AI video models forget what your character looks like — a tail changes colour mid-run, a leap hovers in mid-air, a prop blinks when it shouldn't. You find out after you've paid. Character Studio is a front end for fal.ai that catches those failures before you spend, using guardrails taken from a real production.
Bring your own fal.ai key · nothing to install · your key never leaves your browser
These aren't best practices copied off a forum. Each one is a specific failure from producing an animated short — found by auditing frames, paid for in real generations, then written down so it never happens twice.
Write your character's description once. It's pasted byte-for-byte into every prompt — the single discipline that stops a character drifting between shots.
Builds the prompt in the order models actually respond to: one camera instruction first, continuous-shot lock, identity, ordered action beats, exclusions, style lock.
Breed names, corrupted text, unfilled template slots, an altered identity block — the Generate button stays disabled until they're gone.
Every take is priced before you commit, and logged after, so you can see where your credits went.
Proven prose for the hard shots — ballistic arcs, size constancy, prop custody, sleep integrity — the language that made those failures stop.
Try the same shot twice and fail? It blocks the third. A repeated failure is structural — change the model or the staging, don't pay to watch it again.
Yes — that's the point. You bring your own key, so you pay fal directly at cost with no markup from us, and we never touch your generation spend. Your key is stored only in your own browser and sent only to fal.ai.
It drives fal.ai's models — Kling, Seedance, Seedream, Flux — from your browser. The tool's job is composing the prompt correctly, routing to the right model, blocking bad takes before they cost you, and showing the result.
No. There's no account and no server holding your data. Your characters, settings and ledger live in your browser's local storage, and you can export the whole project as a single file to move it to another device.
Yes. The rules are about how video models fail — identity drift, invented accessories, treadmilling, floating physics — not about any particular character. You define your own cast and the system applies to them.
The studio is free to use — no signup, no account. You only ever pay fal.ai directly for the generations you run, at their price, with your own key.