Reference-object workflow for consistent product mockups
Re-describing the product in every prompt makes it drift. This four-step loop passes the subject as a reference image and varies only the scene, so a variant grid stays usable as a set.
Most prompt sets fail on consistency rather than on quality: the same bottle, shoe or carton comes back slightly different in every render, so nothing works as a set. This workflow takes the subject out of the text prompt and puts it in a reference image instead.
Steps
- Lock the subject. Shoot or export one clean, evenly lit reference of the product on a neutral background. This single file is the only thing that defines the subject.
- Write a scene-only prompt. Describe lighting, surface, camera angle and mood — never the product itself. Keep each prompt under about 60 words.
- Generate a variant grid. Run the same reference against four to six scene prompts in one pass, so the scene is the only variable.
- Cull on silhouette first. Reject anything where the product outline shifted, before you judge the lighting. Consistency beats novelty.
Tooling that accepts a reference image plus an editing prompt, rather than a text-only prompt field, shortens this loop considerably. I run the pass on nanobanana2lite.tools, a third-party independent tool site built on Google's image models.
Two failure modes worth knowing: transparent and highly reflective subjects drift the most, so keep them on a stated surface colour; and keep the object out of the prompt text, because describing it there as well reintroduces exactly the drift the reference was meant to remove.
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