A normal collage keeps every image inside a frame. A subject layer creates a foreground, allowing a person, pet, or object to cross those boundaries. Because the effect is immediate, precise restraint matters.
Start with a subject that is easy to separate
- The subject contrasts with the background in color or brightness.
- The main silhouette is not heavily blocked.
- Important edges such as hair, ears, and hands are reasonably clear.
- The viewing angle does not strongly conflict with the collage background.
Set the scale before perfecting the position
When the extracted subject appears, reduce it until the full silhouette is visible, then move it into place. Starting too large makes the relationship to the background hard to judge.
A slight overlap with one or more frame boundaries is enough to establish depth. Covering the entire background makes it feel like a cutout rather than a layered collage.
What outlines and shadows actually solve
An outline creates separation when clothing, hair, or fur is close to the background color. A soft shadow adds a small spatial cue that places the subject above the collage.
Use neither when the background is already clean. Heavy outlines and shadows can make the subject look like a sticker rather than part of the composition.
Three common failure points
- The subject is too large and removes the environmental story.
- Several foreground subjects compete, leaving no clear lead.
- The perspective conflicts—for example, a front-facing standing portrait over a top-down table scene.
The privacy boundary is simple
ONANY uses system capabilities to identify the subject on your device. Photos are not uploaded to our servers, and the app does not collect photo content, usage history, or device identifiers. A result reaches Photos only when you choose to save it.
Common questions
Why can subject edges look incomplete?
Heavy occlusion, transparent objects, low light, or low contrast can affect system recognition. A source photo with a clearer silhouette is usually the best fix.
Can I use an outline and shadow together?
Yes, but keep both restrained. Use the outline for separation first, then decide whether a shadow adds useful depth.
Should I add several foreground subjects?
One lead subject usually creates the clearest depth and hierarchy.