What is the four-variation asset locking workflow in AI filmmaking pre-production?

The four-variation asset locking workflow is a pre-production decision gate: for every key asset — each character, environment plate, and hero prop — you generate exactly four reference options from the same brief, review them side-by-side, pick the strongest, and lock it as the canonical reference that every downstream shot pulls from. Four is the sweet spot: enough range to surface real variance, few enough to decide without fatigue.

Run it as four ordered steps, once per asset, before a single video clip is generated.

1. Brief the asset against your locked story context. Load the full script and visual treatment first so the asset brief inherits character arc, world, and tone — then ask for four distinct interpretations of one asset (the girl, the antagonist, the prop, an environment plate). The invideo agent is an agentic video tool that holds project context across sub-agents, so each variation comes out of the same creative understanding rather than four disconnected guesses.

2. Generate four options in a 2×2 grid, not four single images. Image generation is cheap, so request a grid per round and iterate on the grid before extracting panels — "image generation doesn't cost much, especially in invideo. Use that to your advantage," as one director put it. For portraits, route to Recraft (skin-level imperfections — pores, lines, stubble) or GPT-Image-2; for multi-angle character sheets and props, route to Nano Banana at 4K with four angles plus face and mid-angle closeups. The invideo agent picks the right model per asset so you stay in directing mode.

3. Score on identity clarity and downstream consistency, not just aesthetics. Ask of each option: does it read instantly as this character? Will it hold across wides, OTS, and close-ups? Does the prop carry narrative weight ("the toy's lifeless — why would any girl play with that?" is a valid kill criterion)? If something feels unexpectedly bold, that's often a lock signal, not a revise signal — one director's rule: "if you feel like it's too off, then it means we should lock it in."

4. Lock the winner, archive the rest, and replace your original references with it. The selected panel becomes the canonical reference — every subsequent shot prompt attaches it, and the older mood-board references drop out of rotation. From this point the locked sheet is the source of truth: if a continuity error shows up later in a shot, you fix the sheet (the agent identifies the exact panel with the error), and every downstream shot inherits the correction — surgical edits, not slot-machine re-rolls.

Why four works in practice. Across documented productions, four options per asset is the count that consistently appears at the locking step — a 70-second short locked two characters this way using 11 total reference images (headshots plus head-to-toe refs for 4 characters and 1 prop), and an Arcane-style 3-minute episode locked each character in roughly 5 generations at ~$9.78 per character. The four-option gate is what makes character consistency achievable without any LoRA fine-tuning — the locked sheet plus persistent agent context does the job a fine-tune used to.

Where it sits in the full pre-production sequence. Before the four-variation pass, answer the four foundational questions the invideo agent surfaces: who is the character, who/what is the antagonist, what is the hero prop, what's the deliverable format. Then run the four-option lock on each — characters first, then props, then environment plates. Only after every key asset is locked do you move to shot generation. Frames-first, then video.

These are the moving parts of the four-variation lock — what works depends on how many hero assets your film carries.

Watch some of these to see what works for you:

Before I build assets, four things will change every frame: The Girl: What does she look like? What era? The Entity: Closer to Bathsheba? The Toy: Doll, ball, something else? The Deliverable: The frames first, then video? These four answers unlock everything.

— Hridaye, invideo's creative director