Prompt: Generate an Illustration Style Guide Sheet
Generates one reference sheet of three sample illustrations in a single consistent style, for checking a style holds before a bigger set is made.
The prompt
Generate ONE image: a style reference sheet containing exactly three separate illustrations, arranged side by side in a single row, all in the same illustration style.
Style: {{ILLUSTRATION STYLE — e.g. flat 2D vector illustration, bold outlines, limited colour palette}}.
Colour palette: {{COLOUR PALETTE — e.g. teal, coral and cream, three colours only}}.
The three subjects, one per panel:
1. {{SUBJECT 1 — e.g. a person working at a desk}}
2. {{SUBJECT 2 — e.g. a potted plant on a windowsill}}
3. {{SUBJECT 3 — e.g. a coffee cup on a table}}
Constraints:
- Exactly three panels, each showing only the subject named for it, with a thin dividing line between panels
- The same line weight, colour palette, shading approach and level of detail must be used identically across all three panels
- Plain white background in every panel, with no additional scenery beyond what's needed to depict the named subject
- No text or labels anywhere in the image
Example: if panel one uses flat colour with no shading, panels two and three must also use flat colour with no shading, not a mix of styles.
Return only the generated image, with no accompanying text or caption.
Before generating, check that the style, palette and detail level described would look identical, not merely similar, across all three panels.
Example
Input
ILLUSTRATION STYLE — e.g. flat 2D vector illustration, bold outlines, limited colour palette: flat 2D vector illustration, bold outlines, limited colour palette COLOUR PALETTE — e.g. teal, coral and cream, three colours only: teal, coral and cream, three colours only SUBJECT 1 — e.g. a person working at a desk: a person working at a desk SUBJECT 2 — e.g. a potted plant on a windowsill: a potted plant on a windowsill SUBJECT 3 — e.g. a coffee cup on a table: a coffee cup on a table
Output (a written description, not a generated image)
What a good result should look like: A single wide image divided into three equal panels by thin vertical lines, each on a plain white background. Panel one shows a person seated at a desk, drawn as a flat 2D vector illustration in bold teal outlines with coral and cream flat fills and no shading. Panel two shows a potted plant on a windowsill in the identical style — same line weight, same flat teal-coral-cream palette, same absence of shading or gradient. Panel three shows a coffee cup on a table, again rendered with matching bold outlines and the same three-colour flat fill approach. No panel includes any additional background scenery beyond the named subject, and no text or labels appear anywhere in the image. Across all three panels, the line weight, palette and level of detail read as visually identical rather than merely similar.
Why it works
- Fixing exactly three panels with one named subject each turns a vague style request into a checkable side-by-side consistency test.
- Requiring the same line weight, palette and detail level across all panels is what a style guide actually needs to prove before scaling up.
- The pre-generation check for identical, not merely similar, styling catches subtle drift before a whole illustration set is built on it.
Why the basic version fails
“Show me some illustrations in this style” run three separate times produces three images that are similar in spirit but visibly inconsistent in line weight, colour or shading — a mismatch that’s easy to miss looking at one image at a time, and expensive to discover only after a full set has already been commissioned or generated.
What this prompt fixes
Putting three different subjects in one image, side by side, makes any drift between them immediately visible in a single glance, which a set of separately generated images can’t offer. Naming the line weight, palette and shading approach explicitly, and requiring them to be identical rather than similar, is what actually tests whether a style is stable enough to build a larger set on.
Tips per model
- Gemini keeps style consistent well within one image; use this sheet before committing to a larger multi-image illustration set to catch drift early.
- ChatGPT’s image generation sometimes lets detail level creep up in later panels of a single image; check the third panel as carefully as the first.
- Once a style reads as consistent here, describe it back using the exact same wording in later single-subject prompts to keep matching results.