How do I stop AI book mockups from changing the spine and page block?

Identify what the reference actually proves

Flat cover artwork is often placed on a generic three-dimensional book shape. That shape may have square boards, a rounded spine or a thick page block that the actual edition lacks. AI can also continue cover text across the hinge or make printed page edges look like a solid white box. A file named book cover is evidence of artwork, not the physical construction receiving it.

Prepare the evidence before generating

1. Identify the exact edition and binding. Photograph a genuine closed copy at an angle that reveals the spine and fore edge.
2. Add a straight spine view and a close view of the cover-to-page relationship. Preserve any real overhang or flexible cover behavior.
3. Keep print-ready cover artwork separate from the physical reference. State which file establishes typography and which establishes construction.
4. Generate a modest composition with the book closed. Review its thickness and binding before asking for an open spread or a stack of copies.

Example creative request and a review matrix

Illustrative request: Create a clean scene for this actual paperback edition. Preserve its photographed spine thickness, flexible cover, page-block proportion and opening direction. Use the supplied approved artwork without continuing lettering around the hinge. Do not replace the edition with a thick hardcover, add decorative page edges or invent interior pages.

Make the release decision

A concept mockup can help discuss artwork before printing, but it should be identified as a concept. When selling an actual edition, retain a genuine construction view in the gallery. Do not derive page count or paper specification from generated thickness. If no physical copy exists yet, state that limitation and obtain publisher or printer dimensions rather than silently presenting a generic mockup as a finished sample.

Download this case’s manual capture card

The CSV below contains this question’s capture steps and symptom-specific review checks. Record your own source filenames, observations and decision in the blank columns. It is a manual worksheet, with no store connection or automatic approval.

Download the capture and review card (CSV)

Reference scope: the listed sources provide relevant photography, media, design or accessibility context. The case-specific checklist is Itemlume editorial guidance, not a vendor guarantee, production standard or report of a completed test.