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I Made a 35-Second Photorealistic AI Film With 5 Segments — Here's the Exact Blueprint

#ai #promptengineering #video #tutorial

Most AI video tools stay stable for about 5–10 seconds per generation. So how do you make a 35-second film that actually holds together — same person, same outfit, one continuous story?

I shipped one: a photorealistic seaside day-in-the-life film, 35 seconds, built from 5 independently generated segments. Here's the exact blueprint I used. It works because the segments connect through discipline, not through luck.

The 5-segment blueprint

Cut on narrative beats, not on time. My film's five beats:

  1. Leave home — the person steps out in the morning light
  2. Arrive — reaching the seaside town
  3. Buy / event — a small shop visit, the day's one real event
  4. Return — heading back as the light turns
  5. Quiet ending — a still, held moment to close

Each segment is generated independently, then stitched in an editor. Merging 1–2 shots per segment is fine; chaining from the previous segment's last frame is not — in my tests, tail-frame chaining drifts faces and outfits the worst.

The three rules that hold it together

1. One character lock block, pasted verbatim everywhere.
Write the person once — hair, eyes, outfit, accessories, in a fixed order — and paste that exact block into every segment prompt. The block stays frozen; only the action and scene change per segment. Miss one item and that item is the one that drifts.

2. Dialogue: 1–2 shortest lines, max.
Long dialogue in generated video turns to mush. One or two short lines carry the scene; everything else is visual. And never ask the model for subtitles — add text and music in your editor, not in the model.

3. Micro-movement, not big action.
For photorealism, small wins: a slow blink, hair stirred by a faint breeze, a hand reaching for a door. The smaller the motion, the better the look survives generation.

The negative-constraint tail (attach to every segment) 

no subtitles, no text, no watermark, no logos, normal hands (five fingers),
no distorted face, no face change
Enter fullscreen mode Exit fullscreen mode

One segment, assembled 

[person lock block], walking down a narrow seaside street in the morning,
carrying a paper bag from the bakery, light steps, side tracking shot,
gulls in the distance, natural light, photoreal, no subtitles, no text,
no distorted face, no face change
Enter fullscreen mode Exit fullscreen mode

The pre-delivery frame check

Before I call a film done, every segment gets the same five questions: same face? Hair and accessories complete? Outfit colors unswapped? Prop states continuous (a bottle cap may only be open after the segment where it opens)? Any stray generated text? If a segment fails, I re-run that segment alone — never the whole film.

Where this comes from

This is one of the 36 templates in my AI Short-Video Prompt Pack Vol.1 — the full system behind 30+ shipped AI shorts: segmented generation for 15–35s films, the character lock block, image-to-video style replication, and the frame-check routine, each template annotated with the tool, aspect ratio and segmentation it was verified with. Bilingual EN / 中文 edition.

If you try the 5-segment blueprint, tell me in the comments how your film held together.

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