furybot

Steps

1. Upload the photo with the subject in it. One clear subject works best. The mask is generated at full resolution, so a larger source photo gives you a better edge, not a slower one.
2. Decide what goes behind. Nothing: you get a transparent PNG. A second uploaded photo: the subject is composited onto it. A description in words: the backdrop is generated around the subject.
3. Say what the subject is if it is ambiguous. A photo with a person, a dog and a bicycle in it has three plausible subjects. Naming the one you mean costs a few words and saves a rerun.
4. Check the result against a background that fights it. Open the cutout on something light and on something dark. Soft edges — hair, fur, motion blur — are where a mask fails, and they fail invisibly against a matching backdrop.
5. Download the PNG. The alpha channel is only preserved in the downloaded file. Screenshot it and you have flattened it onto whatever was behind the preview.

Tips

• Composites read as fake mostly because of light direction, not because of the mask. If you are describing a backdrop, describe the light too — "late afternoon sun from the left" is worth more than another adjective about the scene.
• For a subject you want to reuse, keep the transparent PNG and composite it yourself later. It is the more reusable artifact.
• If the edge is close but not right, a slightly larger or better-lit source photo usually beats rerunning the same one.

Limits worth knowing before you start

• You get a PNG with real alpha. Save it as a JPEG anywhere along the way and the transparency is gone — JPEG has no alpha channel.
• It removes and replaces the background. It does not relight the subject to match a new scene, so a hard-shadowed subject dropped into flat light still looks hard-shadowed.
• Nothing is archival. Uploads are deleted as soon as the job finishes, generated files are swept automatically after about a day, and the prompt text is blanked on the same schedule. Download what you want to keep — this is a workshop, not an archive.
• Adult content is absent from this product rather than switched off. There is no setting, plan, administrator action or support request that introduces it, on the site or on the API.
• Four things are refused on every plan, each one traceable to a law rather than to our taste. They are listed in full, with the statute behind each, on the safety page.

Questions

What file do I get back?

A PNG with a real alpha channel, so the transparency survives being placed somewhere else.

Can I supply my own background?

Yes. Add a second photo and the subject is composited onto it, or describe a scene in words instead.

Is the upload kept?

No. Uploads are deleted when the job finishes, and generated results are swept after about a day.

Account, billing and retention questions are on the FAQ.