Keeping a Set of Images Consistent
One good image is easy. Twelve that look like they belong to the same brand is the actual problem — and it is solved with constraints, not prompting skill.
A single striking image is not a brand. What makes a site, a feed or a deck look professional is that everything in it looks related — and generated images default to looking unrelated, because every generation starts fresh.
Consistency comes from constraints you decide once and never renegotiate, not from getting better at prompting.
Decide these five, then stop deciding them
- Palette — three or four colours, written down as names and hex codes, appearing in every prompt
- Lighting — pick one. Soft daylight, or warm evening, or flat studio. Mixing them is what makes a set look scavenged
- Medium — photographic, or illustrated, or 3D. One. A page that mixes photo-real and flat vector reads as unfinished
- Perspective — eye level, or overhead, or three-quarter. Consistent angle does more for cohesion than consistent colour
- Level of detail — busy and textured, or clean and minimal
A reusable style block
STYLE (paste unchanged into every prompt):
Flat vector illustration, clean geometric shapes, no gradients,
no outlines. Palette limited to deep green (#1F5A3D),
off-white (#F7F6F2), warm sand (#E4D9C3) and charcoal (#2B2B2B).
Even, shadowless lighting. Eye-level perspective.
Generous white space. No text in the image.
SUBJECT (changes each time):
[what this particular image shows]Generate a set, not a sequence
If you need eight images, generate all eight in one session with the same tool, same model version and same style block. Coming back three weeks later gives you a different model, a different mood and a set that does not match — and you will not be able to say exactly why.
Batch the work even if you will publish it over months.
Where to keep it
A simple brand file solves the version of this problem that bites hardest six months later, when you need one more image and cannot remember how the first eight were made.
- The style block, exactly as pasted
- The tool and model version used
- The final prompt for each image in the set
- The source files, not just the exports — you will want to re-crop
- One line on what the set is for, so you do not reuse a blog style on packaging
When to break the pattern
Consistency is a default, not a rule. A single deliberately different image — a hero, an announcement, a campaign — gets attention precisely because everything around it is uniform. That only works if the uniformity is real.
What to take from this chapter
- Fix palette, lighting, medium, perspective and detail level once, then reuse them verbatim
- Keep a style block at the top of every prompt and vary only the subject
- Generate a whole set in one session — models and moods drift between sessions
- Store the style block, tool version, prompts and source files in a brand file
- Deliberate exceptions only read as deliberate when the baseline is consistent
Try it
Write your style block now — palette with hex codes, one lighting choice, one medium, one perspective. Generate three unrelated subjects with it. If they look like a set, the block is good; if not, the block is too vague.