How to Keep an AI Character or Product Consistent Across Every Scene

The fastest way to tell a video was made by AI is drift. The presenter has a slightly different face in every shot. The product on the table is a different shade of blue each time it appears. Each scene looks fine in isolation, but cut together they feel like three different people advertising three different products. For a brand, that is fatal — consistency is what makes content recognizable.

Why AI video drifts

Most text-to-video tools generate each scene from scratch off a fresh text prompt. Even with identical wording, the model invents new details every time — there is nothing tying scene two back to scene one. The more scenes you add, the more the character and product wander. Prompt engineering alone cannot fully fix this; the model simply has no memory of what it drew last.

The fix: anchor every scene to one reference image

The reliable solution is image-to-image generation. Instead of describing your character or product in words and hoping, you give the model an actual reference image and have it generate each scene from that image. The subject is carried forward visually, not re-imagined from text, so the same face, outfit and packaging persist shot after shot.

In Reelipal this is a single step: upload one product or character image, and every scene is generated from it via Nano Banana 2 image-to-image. Each scene still follows its own prompt for setting, action and camera move — but the identity at the center of the frame stays locked. Leave the reference empty and you get fast text-to-video; add it and you get a consistent, on-brand cast.

Consistency is not a nice-to-have for brand video. It is the entire point — it is what turns a pile of clips into something recognizably yours.

Make it repeatable

• Use a clean, well-lit reference — a clear product shot or a single, unambiguous character image works best.
• Lock the format (9:16, 1:1 or 16:9) so every variant shares the same frame.
• Reuse the same reference across campaigns to build a recognizable visual identity over time.
• Let each scene prompt vary the setting and action — only the subject needs to stay fixed.

Once the subject is anchored, scale stops fighting consistency. You can spin up a dozen variations of an ad — different hooks, settings and CTAs — and every one features the same character and the same product, exactly as a real brand shoot would. And if you find yourself reusing the same persona across videos, images and podcasts, save it once as a reusable character instead of re-describing it in every brief.