Proofsheet
Sitting by a rooftop water tank at blue hour — example resultReal example
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Made with this exact default prompt; output can vary.

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Sitting by a rooftop water tank at blue hour

A relaxed blue-hour portrait of you sitting by a rooftop water tank with city lights behind. Upload a clear photo, paste this prompt into ChatGPT, Gemini or Grok, change the parts in brackets to suit you, and generate.

Part of the Blue hour rooftop portrait trend

Written for
ChatGPT, Gemini, Grok
You'll need
A clear photo to upload
Status
Tested 19 Oct 2026 in grok-imagine-image-2.0
Test settings
Reference photo: an AI-generated picture of a fictional woman (not a real person), made in Grok for this test. Uploaded with the default copy text unchanged. Aspect ratio 9:16. First result used; resized to 900x1600 and converted to WebP.
Variability
Faces, poses and small details vary between runs; always compare the result with your own photo.
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Prompt
Use the uploaded photo as the reference for the person. Preserve their recognisable face, natural skin tone, hairline and body proportions as closely as the model permits; check the result against the reference.
Scene: a city rooftop at blue hour, the person sitting on a low step beside a big black water tank, fairy lights strung on a clothes line.
Pose: sitting with knees up, arms resting on them, looking off to the side.
Clothing: an oversized shirt and loose trousers.
Light: soft direct flash, lavender sky glow, warm fairy-light dots behind.
Style: dreamy candid flash photo, soft colours, gentle grain, natural skin texture.
Format: vertical 9:16
Avoid: changing the face or identity, sitting on the roof edge, extra fingers, text, logos, watermarks.

Customise

For example: a big black water tank.

For example: an oversized shirt and loose trousers.

Fields start with illustrative values; replace them with your own facts. The prompt updates as you type. Copy prompt copies your version.

How to use it

  1. Open an external image tool listed above. The tested model, if any, is named in Status.
  2. Upload a clear reference photo of the subject. If it includes identifiable people, get their consent and check each face.
  3. Customise the fields, copy your version, paste it with the photo and generate.
  4. Compare the result with the reference. If a face, pose or detail changes, ask for one correction or try again; an exact match is not guaranteed.
How to use this prompt
  1. This prompt changes your own photo. Choose a clear reference photo, and get permission from people who can be identified.
  2. Upload the photo in the external AI app you chose. Fill Customise, press Copy prompt and paste the prompt with the photo.
  3. Compare the new picture with the original. Face, hands, clothes and pose can change. An exact likeness is not guaranteed.

Full guide: Search, Copy, Save and test labels

Good to know

  • Side glances reduce likeness; ask for a look toward the camera if needed.
  • Use reference photos you have the right to use; get consent from identifiable people.

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Sitting by a rooftop water tank at blue hour
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