Why won't Adobe Firefly use your picture as a reference? Check its AI preference.
Imagine signing your illustration with a ‘don't train AI on this’ preference, then trying to use it as the reference for your next image. The refusal could be the tool following your instruction. Adobe's existing Content Credentials guide says its generative AI training and usage preference prevents use in Firefly's Style Reference, Structure Reference and Generate Similar tools. Those tools influence an output without training on the image. The same guide says work with the preference enabled cannot be uploaded to Adobe Stock. I would explain these consequences beside the choice, before a creator applies it across a portfolio. ‘Training and usage’ is easy to read quickly as ‘training’; finding out later can make a working protection look like a broken feature. If your own reference image is refused, check the preference before rebuilding the file or blaming the prompt. Decide whether you want to permit that use rather than strip the protection just to get past the error. This is a documented restriction, not a refusal I've tested. It is also a preference for supported tools, not a promise that every AI company will honor it.
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If a designer hits this restriction near a deadline, the project lead should offer a reference cleared for that use or change the brief. ‘Just remove the flag’ makes the designer decide whether to weaken a creator's preference to keep the job moving. I would mark supplied images as view-only or approved for generative reference when assembling the brief, and leave uncertain ones out of Firefly. Those labels would be our team's notes, not Adobe settings. The person making the image should not have to settle the permission question while everyone waits for the draft.
A pseudonymous illustrator faces another condition before the brief even exists. Adobe says selecting this preference requires a verified name or at least one connected social account in the Content Credentials. I'd want that requirement explained before telling artists to protect a whole portfolio this way. Someone may want to refuse AI use without linking their artwork to another identity. The guide does not establish that a connected account reveals a legal name, and I would not assume it does. But making refusal depend on an identity connection is still a cost worth stating, not hiding behind ‘just turn it on.’