Why does a replaced product look pasted into the ad?

Locate the break between item and scene

Inspect the base of the item first. A bottle on stone needs a believable contact area; a pouch against a wall needs an understandable support. A missing shadow can make it float, while a shadow that points toward the light can make the whole image feel inconsistent.

Next compare the apparent camera angle. A front-facing product in a steep overhead setting may be impossible even if both parts look realistic individually. Use a compatible source angle or allow the reference layout to change. More background detail cannot resolve contradictory perspective.

Name the failure precisely

These are visual diagnoses, not claims about the provider’s internal processing. A symptom can have several causes. Compare against the source and keep the revision small enough to judge its effect.

Revise in a deliberate order

1. Confirm the product itself is still the correct variant.
2. Remove unnecessary overlapping props and difficult reflective surfaces.
3. State the intended support, viewpoint and light direction in the additional requirements.
4. Create a new remix, then inspect the same boundary that failed previously.

If the reference asks a large item to fit behind a small foreground prop, change the arrangement. Do not keep generating until one distorted item happens to look integrated. Use a simpler composition to establish the product, then bring back only the props that contribute a specific idea.

Review more than the thumbnail

At full size, examine the label edge, object intersections and shadow origin. At the destination size, judge whether the product remains the focal point. A tiny edge defect may be irrelevant in a small social asset, but an extra part or impossible support can misrepresent the sale item at any size.

Record the failing boundary and the revision used. If contact remains unreliable, retain a simpler product photograph or use an appropriate manual composition workflow outside Itemlume. The current Image remix interface should not be described as a pixel-locked layer compositor or an automatic defect repair guarantee.