The same character across many photos

Every photo on this site's pages shows the same character, made through this API. This is how.

Start from one clean photoCopy Anchor Link

One subject, front on, plain background, nothing hiding the face. That's what we used:

Describe what must not changeCopy Anchor Link

Models keep what you name. Write the same description into every prompt, word for word:

Keep the purple character from img1, with the same black cap, yellow sunglasses,
black hoodie, cargo pants and sneakers.

Then say what's new, in a second sentence.

{
  "model": "nano-banana-pro",
  "input": {
    "prompt": "Keep the purple character from img1, with the same black cap, yellow sunglasses, black hoodie, cargo pants and sneakers. He plugs a glowing lime green cable into the back of a small friendly white robot.",
    "images": ["https://docs.nocamclub.com/examples/mascot.jpg"],
    "resolution": "2K",
    "aspect_ratio": "16:9"
  }
}

Reuse the fileCopy Anchor Link

Upload the photo once and use its file_… id everywhere, so each generation starts from the same bytes. Files stay for 48 hours, so upload again for later work.

Add a second file for the detailsCopy Anchor Link

Need a logo on the wall? Send it as img2 and say where it goes. That's how the picture at the top of this page was made.

What driftsCopy Anchor Link

Small details go first, particularly on video. In our clip, the character's yellow sunglasses came out dark purple. So:

• Check the details that matter on each result.
• Put them in the prompt by name if they keep drifting.
• For a series, make every frame from the original photo, not from the previous result. Copies of copies drift further.

Which modelCopy Anchor Link

• nano-banana-pro for holding a look across angles.
• nano-banana-2 when you need it cheaper or at 4K.
• seedream-5.0-flash when you have many reference photos of the same subject.

Real people: use only photos of yourself or of someone who agreed, and expect some models to refuse. See Content rules.