Creators hear that long "negative prompts" fix everything: no blur, no warp, no extra fingers, no text, no distortion. In practice, giant ban lists often fight your positive instructions and still fail. This guide treats AI video negative prompts and consistency as a small, deliberate craft—short avoid phrases when needed, clearer positives always, and a workflow that keeps subjects steadier across a Shorts pack.
Avocadio supports Text to Video and Image to Video with starter prompts, credits, and history. Use history to compare takes instead of guessing which wording helped. Nothing here invents a special negative-prompt toggle—think in terms of what you ask for and what you gently steer away from in plain language.
Create this in Avocadio — Write a short positive shot brief, generate once, then adjust a single clarity line while comparing takes in history. Try Avocadio
Positive clarity beats giant ban lists
Start every brief with four positives:
- Subject with concrete detail
- One action
- One camera move
- Light and mood
Example: "Red enamel kettle on a gas stove, gentle steam rising, slow push-in, warm kitchen side light, cinematic cozy mood."
Only after a failed take should you add a short avoid clause, such as "avoid warped handle, avoid extra spouts, avoid readable labels." Keep avoids tied to the artifact you actually saw. Copying a fifty-line ban list from a forum usually dilutes the subject line—see the constructive prompting habits in how to turn text into video with AI and cinematic AI video prompts.
When short avoid phrasing helps
Useful situations:
- Text soup: "avoid on-screen text, avoid logos, avoid watermarks" when the model invents letterforms.
- Morphing product edges: "avoid melting logo, avoid warping label" after you saw it happen—better yet, switch to Image to Video from a clean still (image to video guide).
- Body horror accidents: "avoid extra limbs, avoid distorted hands" for people shots—or reframe to silhouette and hands-only detail.
- Lighting mud: rather than "no bad lighting," say what you want: "hard side key, deep shadows, minimal fill" using ideas from the lighting guide.
Avoid phrases that are vague ("bad quality," "ugly," "wrong")—models cannot operationalize them well.
Consistency tactics that actually work
- Style card: keep a note with subject description, colors, time of day, and lens feel. Paste it into every prompt in a series. Change only the action line between beats.
- Still-first identity: when a bottle, room, or face must match reality, start from a photo and request restrained motion: "slow push-in, subtle parallax, hold edges stable."
- Shot scale lock: if clip A is a close-up, do not let clip B jump to an extreme wide without intention—continuity will feel broken even if each clip looks pretty alone.
- History discipline: rename or annotate keepers mentally ("kettle-steam-v3") so you reload the exact prompt that worked instead of rewriting from memory.
- Credit pacing: after two misses with identical wording, change one module. Identical regenerations rarely invent consistency.
Artifact clinic (symptom → fix)
- Smeary edges on a logo: stop Text to Video for that hero; use Image to Video from a sharp packshot; reduce motion strength in the brief.
- Random floating objects: your prompt listed too many nouns. Delete props until one subject remains.
- Face identity drift across a trilogy: accept silhouette continuity, or generate all people beats from the same still; do not expect perfect actor match from text alone.
- Overexposed glow: specify "soft controlled key, no blown highlights" and remove words like "holy light" or "nuclear glow."
- Jittery camera: replace "handheld chaotic" with "gentle drift" or "static with subtle life."
