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VTON 3.5 applies garments and accessories from a reference image onto a person. A strong prompt tells the model what item or outfit to apply, where it belongs, and which visible garment details matter. Write the prompt like clear styling direction: name the item, describe what it looks like, and avoid asking for unrelated changes.

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At a glance

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Core prompting principles

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1. Use one clear action

Each prompt should focus on one try-on action. Use substitute when an existing clothing region should be replaced:
  • “Substitute the upper body garment with a cropped black leather jacket.”
  • “Substitute the lower body garment with wide-leg white tailored trousers.”
  • “Substitute the outfit with a red sleeveless midi dress.”
Use add when the item sits on top of the existing outfit and does not replace clothing:
  • “Add a black ribbed-knit beanie to the outfit.”
  • “Add a tan leather shoulder bag to the outfit.”
  • “Add a gold pendant necklace to the outfit.”
Avoid mixing actions in one prompt, such as replacing a jacket and adding a bag at the same time.

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2. Name the region being changed

Be specific about what part of the outfit should change.

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3. Let the reference image lead

The reference image is the source of truth for the garment. Describe what it actually shows, explicitly — not a new imagined version of it.
Good prompts describe the visible item directly:
  • “Substitute the upper body garment with a dark green hooded jacket.”
  • “Substitute the lower body garment with white tailored trousers.”
  • “Add a black ribbed beanie with a folded cuff to the outfit.”
Avoid relying on vague phrases:
  • “Use this.”
  • “Make it stylish.”
  • “Give me the same vibe.”

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4. Describe visible garment details

VTON works best when the prompt includes concrete fashion details. Describe what can actually be seen. Useful details include:
  • Color
  • Fabric or material
  • Garment type
  • Fit or silhouette
  • Length
  • Sleeves
  • Neckline or collar
  • Closures, such as zipper, buttons, snaps, or drawstrings
  • Pockets
  • Texture
  • Pattern
  • Visible logo, graphic, or brand text
Examples:
  • “Substitute the upper body garment with a dark green hooded jacket, zipped closed, with large front utility pockets and a small white logo on the left chest.”
  • “Substitute the lower body garment with oversized burnt orange sherpa fleece trousers with a drawstring waistband.”
  • “Add a black thick ribbed-knit beanie with a folded cuff and a small white brand label to the outfit.”
Do not invent logos, text, or details that are not visible in the reference image.

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5. Say whether garments are open or closed

For garments with buttons, zippers, or front openings, include how they are worn. This matters for:
  • Jackets
  • Coats
  • Cardigans
  • Blazers
  • Vests
  • Dress shirts
  • Zip hoodies
  • Button-up garments
Examples:
  • “Substitute the upper body garment with a black blazer, worn open on top of a white crew-neck t-shirt.”
  • “Substitute the upper body garment with a navy zip-up hoodie, zipped closed.”
  • “Substitute the outfit with a closed two-button black blazer, a black ribbed turtleneck sweater, and white tailored trousers.”
If the garment is open over another visible layer, describe the base layer too.

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Strong prompt examples

  • “Substitute the upper body garment with a grey sleeveless crew-neck t-shirt featuring a single chest pocket with a small logo.”
  • “Substitute the outfit with a closed two-button black blazer, a black ribbed turtleneck sweater, and white tailored trousers.”
  • “Substitute the lower body garment with oversized wide-leg burnt orange sherpa fleece trousers featuring a drawstring waistband.”
  • “Substitute the footwear with white low-top leather sneakers with a clean toe box and thin rubber sole.”
  • “Add a black thick ribbed-knit beanie with a folded cuff and a small white brand label to the outfit.”

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Common mistakes

Being too vague:
  • “Make me fashionable.”
  • “Use the reference.”
  • “Try this look.”
Requesting unrelated changes:
  • “Change my face.”
  • “Make me taller.”
  • “Change the background.”
Inventing details:
  • “Add the [Brand name] logo,” unless the logo is clearly visible.
  • “Make it silk,” if the reference does not show silk.
The best VTON prompts are short, visual, and specific: one action, one target region, and a faithful description of the visible garment.

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Writing prompts with an AI assistant

If you would rather not write the prompt yourself, a chat assistant such as ChatGPT, Claude, or Gemini can turn a garment photo into a ready-to-use prompt.
1

Upload the garment image

Open the assistant and upload the garment image (a screenshot from a store page works too).
2

Add a photo of the person (optional)

Also upload a photo of the person who will wear it — this helps the assistant name the region correctly (for example, “the upper body garment”).
3

Paste an instruction and copy the result

Paste an instruction like the one below, then copy the result into VTON 3.5.
Prompt to paste
Always review the result before using it — check that every detail actually appears in the image, and delete anything the assistant guessed.

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Preparing a clean garment image

VTON 3.5 works best from a clean garment image: just the item, on a plain background, with no one wearing it. Photos from fashion websites usually show a model, a background, and props instead. You can create a clean version with an image-generating assistant (for example, ChatGPT, Gemini, or another image tool):
1

Upload the original photo

Add the source photo to the assistant.
2

Ask the tool to isolate the garment

Ask the tool to isolate the garment on a plain background, for example:
Prompt to paste
3

Use the cleaned image in VTON 3.5

Use the cleaned image as your reference, paired with a descriptive prompt.
Keep the garment’s real color and details — do not let the tool restyle or “improve” the item, because VTON reproduces what the reference shows.