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Image-generation prompts built from the official prompting guides: what to specify, in what order, and where results usually miss.
- AI banner image with negative space for text, cropped to 3:1
Place the subject where a 3:1 crop of a 16:9 image keeps it, write that into the prompt, then check that the copy area is flat by its standard deviation.
Gemini API image generation docs · 2026-10 · ImageMagick 6.9.12 · Ubuntu 24.04 - YouTube thumbnail AI prompt with a title readable at phone size
Set the title's place and size in the prompt, then shrink the thumbnail to 168×94 with ImageMagick to see if the title still reads.
Gemini official image prompting tips · 2026-10 · title candidates gemini-3.8-flash run 2026-10-20 · ImageMagick 6.9.12 · Ubuntu 24.04 - AI change background, keep product same — verify with compare
Swap only the background of a product photo, then crop the product and label and run ImageMagick compare to catch a changed shape or letter.
Gemini official image editing guide · 2026-10 · comparison with ImageMagick 6.9.12 - Product mockup prompt with set lighting and camera angle
Draft product shots for an item with no photos by filling five slots: product, surface, lighting, angle and focus. Then sort the results with a checklist.
Gemini official image prompting guide · 2026-10 · ratio check with ImageMagick 6.9.12