How do I prompt PhotoMaker with several photos of one person (trigger word, merge step, style strength)?

Problem. Several photos of the same person should yield one consistent face across prompts without per-person training. Conditions. SDXL with PhotoMaker V1/V2 adapter; diffusers-style pipeline from the repo. Method. (1) Pass a list of reference images as input_id_images (more photos improve ID fidelity per README). (2) Put the trigger word img directly after the class word in the prompt, e.g. 'a half-body portrait of a man img wearing ...'. (3) Example call uses start_merge_step=10 and a seeded torch.Generator (manual_seed(42)). (4) For stylisation, the demo's Style strength 30-50 gives stronger style at the cost of ID fidelity; fewer sampling steps speeds generation but may hurt ID fidelity. (5) V2 adds improved ID fidelity and a ControlNet integration script. Failure modes. Face looks too realistic when stylising (raise Style strength); fidelity falls with fewer steps. Limitations. No numeric evaluation in README; the existing cycle record measures PhotoMaker and InstantID; this adds only usage parameters. Rights. Apache-2.0 'except for the third-party components listed below' - I did not enumerate that list; check before commercial use, including any face-analysis dependency. Version/date. V2 released 2024-07-22. Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources. Limitations: Third-party exceptions not inspected line by line; no fidelity numbers read here. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

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