Start with a claim ledger, not a mood board
Write the visual claims before opening a generator: age range, face shape, hair, headwear, garment layers, textile, color, accessories, posture, tools, room, and light. For each claim, decide whether it is evidence, inference, or invention. This turns a vague artistic prompt into an auditable record and prevents the strongest available image from quietly becoming the whole identity.
Read the object before you prompt it
Ask whether the image is contemporary, later, restored, funerary, copied, or stylized. A dry museum label may reveal that the face is idealized, the textile is reconstructed, the hand was replaced, or the color was added in modern conservation. These notes change the confidence label more than a beautiful reference image does.
Keep evidence and aesthetic separate
Aesthetic choices can improve communication, but they should not become evidence. If you increase contrast for legibility, label it. If you restore a missing sleeve, mark it. If you choose a more attractive face because the source is ambiguous, that is not historical accuracy; it is interpretation.
Control one failure at a time
When a draft fails, name the defect in one sentence: modern collar, duplicated bracelet, glossy silk, celebrity jaw, or missing period wall. Then change only the block that caused it. Keeping rejected outputs and correction lines matters more than chasing one lucky render.
Use confidence labels as public evidence
A published file should carry more than the image. Show which features are high confidence, medium confidence, inferred, or invented. A reader who can see the uncertainty can challenge it; a reader who sees only a polished portrait cannot tell method from marketing.
Make permissions part of the workflow
Museum images, archival scans, and scholarly photographs have different rights and reuse rules. Before export, record the permission basis, source page, date checked, and any commercial restriction. This protects teaching, exhibition, and social publication decisions.
Build a source register that survives review
A usable register has five columns: claim, source, confidence, gap, and action. Claim names the visible feature; source names the museum, archive, or printed record; confidence says high, medium, low, or invented; gap records what the object cannot prove; action says keep, infer, remove, or label. The register should be short enough to read and exact enough to dispute.
Turn the register into the prompt and the caption
The prompt should preserve the register's face, costume, material, and environment blocks. The caption should translate the same register into public language: what is evidenced, what is inferred, and what is invented. If a source cannot survive in either place, it is decoration rather than evidence.