Why Did FASHN Product to Model Change the Pose and Background of My Reference Person?

Identify What the Reference Photograph Must Preserve

A merchant may provide a model photograph for two very different reasons. One brief requires a recognizable person in a newly generated campaign image. Another requires the existing photograph's seated pose, camera composition, and environment to remain intact while clothing changes.

Those briefs should not be treated as equivalent. In Product to Model, face_reference serves the identity-reference role, not the role of a complete photograph whose pose and background must be retained. Decide which visual properties are fixed before choosing the workflow.

Choose the Workflow by Preservation Requirements

Choose by the property the merchant must preserve. Product to Model creates a new image using face_reference. For clothing replacement on an existing model photograph while retaining its pose and background, the documented alternative is Try-On Max with model_image.

Face guidance is not limited to identity alone: Product to Model's face_reference_mode defaults to match_reference, which favors the reference face's pose and expression. match_base gives more weight to the prompt or system default when generating pose and expression. These facial influences do not promise preservation of the original full-body pose, composition or background.

Neither workflow distinction guarantees exact identity reproduction, unchanged pixels or perfect garment details. Record fixed properties and permitted changes before requesting a candidate.

1. Label the approved reference as an identity guide or an existing photograph whose scene must remain.
2. Record the selected endpoint, actual image field and, for Product to Model with a face reference, face_reference_mode.
3. Review identity, facial pose/expression, full-body pose, background and garment representation as separate observations.

Use the FASHN Product to Model reference definitions to check the existing-photo alternative and the two face_reference_mode behaviors.

In the production brief, separate model identity from pose and context before assigning each reference a responsibility.

Illustrative Exercise: Two Advertising Briefs

Illustrative exercise, not an executed API request: a café brief fixes the approved photograph's seated pose and scene, while a seasonal brief allows a new composition using an identity reference. Compare the workflow choices in the table, then record the actual endpoint and each preserved property in the worksheet.

Build a Reference-Responsibility Handoff

Before production, label each reference by its intended responsibility: identity, pose, background, clothing, or overall composition. Do not simply attach a photograph with the instruction to keep everything.

For the café brief, reviewers should compare the intended existing pose and setting with the resulting image. For the seasonal brief, reviewers should assess the newly proposed composition against the approved identity-reference requirements.

Record the selected endpoint and the reason for choosing it. If the result changes something that the brief required to remain fixed, investigate workflow selection before rewriting unrelated creative directions.

This guide follows the documented Product to Model Preview behavior released September 2, 2025. The examples are planning exercises, not evidence of generated results or guaranteed preservation.

Reference responsibility and workflow record — complete with actual observations

Save a copy of this record and enter actual inputs, actions and observations. Keep incomplete checks pending; do not prefill success.

Download review worksheet (CSV)